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definitions

drop-in

[drop-in]
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noun

Informal. Also dropper-in. a person who or thing that pays an unexpected or uninvited visit: a feeder for squirrels, raccoons, and other drop-ins.
Informal. a social gathering at which the guests are not expected to stay long: Be sure to stop by our house for a glass of eggnog at our Christmas drop-in.

adjective

provided for short-term patronage: a drop-in shelter for the homeless.
requiring only insertion to be ready for use: a drop-in film cartridge.

Origin of drop-in

First recorded in 1810–20; noun, adj. use of verb phrase drop in

drop

[drop]

noun

a small quantity of liquid that falls or is produced in a more or less spherical mass; a liquid globule.
the quantity of liquid contained in such a globule.
a very small quantity of liquid: I'll have a little more tea, just a drop.
a minute quantity of anything: not even a drop of mercy.
Usually drops.
  1. liquid medicine given in a dose or form of globules from a medicine dropper.
  2. a solution for dilating the pupils of the eyes, administered to the eyes in globules by a medicine dropper.
a limited amount of an alcoholic beverage: He occasionally takes a drop after dinner.
an act or instance of dropping; fall; descent.
the distance or depth to which anything drops: a ten-foot drop to the ground.
a steep slope: a short drop to the lake.
a decline in amount, degree, quality, value, etc.: a drop in prices.
a small, usually spherical, piece of candy; lozenge: a lemon drop.
a central depository where items are left or transmitted: a mail drop.
a predesignated place where secret letters or packages can be left to be picked up by another person without attracting attention, as in espionage or drug dealing.
something resembling or likened to a liquid globule, as certain ornaments, a spherical earring, etc.
a pendant.
a descent by parachute.
an instance of dropping supplies by parachute or an amount of supplies so dropped.
something that drops or is used for dropping.
a group of persons dropped by parachute, as the personnel dropped by parachute during one military action.
Theater.
  1. drop curtain.
  2. drop scene.
trapdoor.
a gallows.
a slit or opening into which something can be dropped, as in a mailbox.
(in a casino) the income from the sale of chips.
a small flag, usually of enameled metal, that gives a visual signal in an annunciator.
Furniture. an applied ornament resembling a pendant.
Architecture. gutta(def 2).
Nautical. the vertical dimension amidships of any sail that is bent to a standing yard.Compare hoist(def 6a).
Also called drop panel. (in reinforced-concrete-slab construction) a thickened portion of the ceiling around a column head.
Horology. the free motion of an escape wheel between successive checks by the pallet.
the newborn young of an animal.

verb (used without object), dropped or dropt, drop·ping.

to fall in globules or small portions, as water or other liquid: Rain drops from the clouds.
to fall vertically; have an abrupt descent.
to sink or fall to the ground, floor, or bottom as if inanimate.
to fall lower in condition, degree, value, etc.; diminish or lessen; sink: The prices dropped sharply.
to come to an end; cease; lapse: There the matter dropped.
to fall or move to a position that is lower, farther back, inferior, etc.: to drop back in line; to drop to the rear.
to withdraw; quit (often followed by out or from): to drop out of a race; to drop from a game.
to pass or enter without effort into some condition, activity, or the like: to drop into sleep; to drop into a habit.
to make an unexpected or unannounced stop at a place; pay an informal visit or call (usually followed by in, by, or over): Since we're in the neighborhood, why don't we drop in at my brother's?
to cease to appear or be seen; vanish: to drop from sight or notice.
to fall wounded, dead, etc.: A thousand men dropped in the battle.
to squat or crouch, as a dog at the sight of game.
to move gently, as with the tide or a light wind (usually followed by down).
Slang. to ingest an illicit drug orally; swallow.

verb (used with object), dropped or dropt, drop·ping.

to let fall in drops or small portions: to drop lemon juice into tea.
to let or cause to fall.
to cause or allow to sink to a lower position.
to cause to decrease in value, amount, quality, etc.; reduce.
to utter or express casually or incidentally: to drop a hint.
to write and send: Drop me a note.
to bring to the ground by a blow or shot.
to set down or unload, as from a ship, car, etc. (often followed by off): Drop me at the corner.
to omit (a letter or syllable) in pronunciation or writing: He dropped his h's.
to lower (the voice) in pitch or loudness.
to cease to keep up or have to do with: I dropped the subject. Will you drop your old friends if you win the lottery?
to cease to employ, admit as a member, or include, as on a list; dismiss: to drop an accountant from the payroll; to drop three members of the club who have not paid their dues.
to withdraw or cease to pursue: The police dropped the charges against the suspect.
Sports.
  1. to throw, shoot, hit, kick, or roll (a ball, puck, etc.) through or into a basket, hole, or other goal: He dropped the ball through the basket for two points.
  2. to lose (a game or contest): They dropped two games in a row and were eliminated from the tournament.
Football.
  1. to drop-kick (a ball).
  2. to score with a drop kick.
(of animals) to give birth to: The cat dropped a litter of six kittens.
to parachute (persons, supplies, etc.): The Marines dropped 300 combat troops into the jungle battlefield.
to lengthen by lowering or letting out: to drop the hem of a skirt.
to lower (the wheels) into position for landing an airplane.
Slang. to take (especially an illicit drug) by swallowing; ingest: to drop LSD.
Nautical. to pass out of sight of; outdistance.
Cookery. to poach (an egg).

Verb Phrases

drop behind, to fall short of the required pace or progress: Her long illness caused her to drop behind the rest of the class.
drop off,
  1. to fall asleep.
  2. to decrease; decline: Sales have dropped off drastically.
drop out,
  1. to withdraw from being a member or participant: to drop out of a club; to drop out of society and become a wanderer.
  2. to stop attending school or college.

Origin of drop

before 1000; (noun) Middle English drop(e) drop of liquid, Old English dropa; (v.) Middle English droppen, Old English droppian; akin to drip, droop
Related formsdrop·like, adjectiveun·dropped, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for drop-in

Contemporary Examples of drop-in

Historical Examples of drop-in

British Dictionary definitions for drop-in

drop

noun

a small quantity of liquid that forms or falls in a spherical or pear-shaped mass; globule
a very small quantity of liquid
a very small quantity of anything
something resembling a drop in shape or size, such as a decorative pendant or small sweet
the act or an instance of falling; descent
a decrease in amount or value; slumpa drop in prices
the vertical distance that anything may fall
a steep or sheer incline or slope
short for fruit drop
the act of unloading troops, equipment, or supplies by parachute
(in cable television) a short spur from a trunk cable that feeds signals to an individual house
theatre See drop curtain
another word for trap door, gallows
mainly US and Canadian a slot or aperture through which an object can be dropped to fall into a receptacle
nautical the midships height of a sail bent to a fixed yardCompare hoist (def. 6a)
Australian cricket slang a fall of the wickethe came in at first drop
See drop shot
a drop in the bucket or a drop in the ocean an amount very small in relation to what is needed or desired
at the drop of a hat without hesitation or delay
have had a drop too much to be drunk
have the drop on someone US and NZ to have the advantage over someone

verb drops, dropping or dropped

(of liquids) to fall or allow to fall in globules
to fall or allow to fall vertically
(tr) to allow to fall by letting go of
to sink or fall or cause to sink or fall to the ground, as from a blow, wound, shot, weariness, etc
(intr; foll by back, behind, etc) to fall, move, or go in a specified manner, direction, etc
(intr; foll by in, by, etc) informal to pay a casual visit (to)
to decrease or cause to decrease in amount or valuethe cost of living never drops
to sink or cause to sink to a lower position, as on a scale
to make or become less in strength, volume, etc
(intr) to sink or decline in health or condition
(intr sometimes foll by into) to pass easily into a state or conditionto drop into a habit
(intr) to move along gently as with a current of water or air
(tr) to allow to pass casually in conversationto drop a hint
(tr) to leave out (a word or letter)
(tr) to set down or unload (passengers or goods)
(tr) to send or postdrop me a line/text/email
(tr) to discontinue; terminatelet's drop the matter
(tr) to cease to associate or have to do with
(tr) slang, mainly US to cease to employhe was dropped from his job
(tr; sometimes foll by in, off, etc) informal to leave or deposit, esp at a specified place
(of animals) to give birth to (offspring)
slang, mainly US and Canadian to lose (money), esp when gambling
(tr) to lengthen (a hem, etc)
(tr) to unload (troops, equipment, or supplies) by parachute
(tr) nautical to leave behind; sail out of sight of
(tr) sport to omit (a player) from a team
(tr) to lose (a score, game, or contest)the champion dropped his first service game
(tr) sport to hit or throw (a ball) into a goalhe dropped a 30 foot putt
(tr) to hit (a ball) with a drop shot
drop astern nautical to fall back to the stern (of another vessel)
(tr) motor racing slang to spin (the car) and (usually) crash out of the race
(tr) slang to swallow (a drug, esp a barbiturate or LSD)
drop dead! slang an exclamation of contempt

noun, verb

rugby short for drop kick or drop-kick
See also drop away, drop in, drop off, dropout, drops

Word Origin for drop

Old English dropian; related to Old High German triofan to drip
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for drop-in

drop

n.

Old English dropa "a drop of liquid," from Proto-Germanic *drupon (cf. Old Saxon dropo, Old Norse dropi, Dutch drop, Old High German tropfo, German Tropfen (n.)), from PIE *dhreu-.

Meaning "an act of dropping" is from 1630s; of immaterial things (prices, temperatures, etc.) from mid-19c. Meaning "lozenge, hard candy" is 1723. Meaning "secret place where things can be left illicitly and picked up later" is from 1931.

Drop in the bucket (late 14c.) is from Isa. ix:15 [KJV]. At the drop of a hat "suddenly" is from 1854; drop-in "casual visit" is 1819; drop-kick is 1857. To get the drop on someone originally was Old West gunslinger slang (1869).

drop

v.

Old English dropian "to fall in drops" (see drop (n.)). Meaning "to fall vertically" is late 14c. Transitive sense "allow to fall" is mid-14c. Related: Dropped; dropping. Exclamation drop dead is from 1934; as an adjective meaning "stunning, excellent" it is first recorded 1970.

Online Etymology Dictionary, © 2010 Douglas Harper
drop-in in Medicine

drop

[drŏp]

n.

The smallest quantity of liquid heavy enough to fall in a spherical mass.
A volume of liquid equal to 176 of a teaspoon and regarded as a unit of dosage for medication.
A small globular piece of candy, usually readily dissolved in the mouth.

v.

To fall, be dispensed, or poured in drops.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Idioms and Phrases with drop-in

drop

In addition to the idioms beginning with drop

  • drop a bombshell
  • drop a brick
  • drop a dime
  • drop a line
  • drop back
  • drop behind
  • drop by
  • drop dead
  • drop in one's tracks
  • drop in someone's lap
  • drop in the bucket
  • drop like a hot potato
  • drop like flies
  • drop names
  • drop off
  • drop out
  • drop the ball

also see:

  • at the drop of a hat
  • bottom drops out of
  • get the drop on
  • hear a pin drop
  • let drop
  • wait for the other shoe to drop
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.