unit

[yoo-nit]

SEE MORE SYNONYMS FOR unit ON THESAURUS.COM

noun

a single thing or person.

any group of things or persons regarded as an entity: They formed a cohesive unit.

one of the individuals or groups that together constitute a whole; one of the parts or elements into which a whole may be divided or analyzed.

one of a number of things, organizations, etc., identical or equivalent in function or form: a rental unit; a unit of rolling stock.

any magnitude regarded as an independent whole; a single, indivisible entity.

Also called dimension. any specified amount of a quantity, as of length, volume, force, momentum, or time, by comparison with which any other quantity of the same kind is measured or estimated.

the least positive integer; one.

Also called unit's place.

(in a mixed number) the position of the first digit to the left of the decimal point.
(in a whole number) the position of the first digit from the right of the decimal point.

a machine, part, or system of machines having a specified purpose; apparatus: a heating unit.

Education. a division of instruction centering on a single theme.

Military. an organized body of soldiers, varying in size and constituting a subdivision of a larger body.

Medicine/Medical.

the measured amount of a substance necessary to cause a certain effect; a clinical quantity used when a substance cannot be readily isolated in pure form and its activity determined directly.
the amount necessary to cause a specific effect upon a specific animal or upon animal tissues.

Mathematics.

an identity element.
an element in a group, ring, etc., that possesses an inverse.

Origin of unit

1570; coined by John Dee as a translation of Greek mónas (previously rendered as unity); perhaps influenced by digit

Related formsin·ter·u·nit, adjectivemul·ti·u·nit, adjectivesub·u·nit, nounsu·per·u·nit, noun

Unit.

Unitarian.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for unit

crew, group, system, entity, member, component, arm, assembly, crowd, complement, outfit, one, entirety, detachment, gang, totality, mob, ring, total, section

Examples from the Web for unit

Contemporary Examples of unit

The unit is used to attack foreign networks, and either it or a sister organization was involved in the Sony hack.
U.S. Should Make North Korea Pay for Sony Hack
Gordon G. Chang
December 18, 2014
“We were part of the unit protecting gas and oil depots outside of Kirkuk,” Rashid says.
Embedding With the Women Who Are Kicking ISIS Ass
Susannah George
December 15, 2014
Her unit first deployed in late June—“A very hot summer,” she remembers.
Embedding With the Women Who Are Kicking ISIS Ass
Susannah George
December 15, 2014
Keep the location work to second unit so I wouldn't have to be away from Alma?
Alfred Hitchcock’s Fade to Black: The Great Director’s Final Days
David Freeman
December 13, 2014
At the same time, the Marines and spouses in the unit shared day-to-day information on a group Facebook page.
War Is About More Than Heroes, Martyrs, and Patriots
Nathan Bradley Bethea
November 12, 2014

Historical Examples of unit

Neither evolution nor involution will ever effect the value of a unit.
Life: Its True Genesis
R. W. Wright
At all events, it is as impossible to demonstrate the non-existence of the one unit as the other.
Life: Its True Genesis
R. W. Wright
Values are reckoned in “skins”—that is, a “skin” is the unit of value.
The Long Labrador Trail
Dillon Wallace
I saw myself now as part of the whole, a unit in the sum of a life which interested me.
The First Violin
Jessie Fothergill
And, for the size-change, a normal diameter, Unit 1—and then up into thousands.
The World Beyond
Raymond King Cummings

British Dictionary definitions for unit

unit

noun

a single undivided entity or whole

any group or individual, esp when regarded as a basic element of a larger whole

a mechanical part or integrated assembly of parts that performs a subsidiary functiona filter unit

a complete system, apparatus, or establishment that performs a specific functiona production unit

a subdivision of a larger military formation

Also called: unit of measurement A standard amount of a physical quantity, such as length, mass, energy, etc, specified multiples of which are used to express magnitudes of that physical quantitythe second is a unit of time

the amount of a drug, vaccine, etc, needed to produce a particular effect

a standard measure used in calculating alcohol intake and its effect

maths

(usually plural)the first position in a place-value counting system, representing a single-digit numberin the decimal system the number 27 has 7 units and 2 tens
(modifier)having a value defined as one for the systemunit vector

Also called: unit set maths logic a set having a single member

short for home unit

short for stock unit

NZ a self-propelled railcar

Word Origin for unit

C16: back formation from unity, perhaps on the model of digit

Unit.

abbreviation for

Unitarian

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 unit

1560s, "single number regarded as an undivided whole," alteration of unity on the basis of digit. Popularized in John Dee's English translation of Euclid, to express Greek monas (Dee says unity formerly was used in this sense). Meaning "single thing regarded as a member of a group" is attested from 1640s. Extended sense of "a quantity adopted as a standard of measure" is from 1738. Sense of "group of wards in a hospital" is attested from 1893.

unit in Medicine

unit

[yōō′nĭt]

n.

An entity regarded as an elementary structural or functional constituent of a whole.

A precisely specified quantity in terms of which the magnitudes of other quantities of the same kind can be stated.

The quantity of a serum, drug, or other agent necessary to produce a specific effect.