Dictionary.com
definitions
  • synonyms

rock1

[rok]
See more synonyms for rock on Thesaurus.com
noun
  1. a large mass of stone forming a hill, cliff, promontory, or the like.
  2. Geology.
    1. mineral matter of variable composition, consolidated or unconsolidated, assembled in masses or considerable quantities in nature, as by the action of heat or water.
    2. a particular kind of such matter: igneous rock.
  3. stone in the mass: buildings that stand upon rock.
  4. a stone of any size.
  5. something resembling or suggesting a rock.
  6. a firm foundation or support: The Lord is my rock.
  7. Chiefly British. a kind of hard candy, variously flavored.
  8. rock candy.
  9. Often rocks. Slang.
    1. a piece of money.
    2. a dollar bill.
  10. Slang.
    1. a diamond.
    2. any gem.
  11. Slang.
    1. crack(def 33).
    2. a pellet or lump of crack.
Show More
Idioms
  1. between a rock and a hard place, between undesirable alternatives.
  2. get one's rocks off, Slang: Vulgar. to have an orgasm.
  3. on the rocks,
    1. Informal.in or into a state of disaster or ruin: Their marriage is on the rocks.
    2. Informal.without funds; destitute; bankrupt.
    3. (of a beverage, especially liquor or a cocktail) with, or containing, ice cubes: Scotch on the rocks; a vodka martini on the rocks.
Show More

Origin of rock1

1300–50; 1905–10 for def 10; Middle English rokk(e) < Old French ro(c)que, roche (cf. roche alum); compare Spanish, Provençal roca, Italian rocca, Medieval Latin rocha, rocca (> late Old English -rocc in stānrocc “stone-rock”)
Related formsrock·less, adjectiverock·like, adjective
Can be confusedboulder cobblestone granule pebble rock stone

rock2

[rok]
verb (used without object)
  1. to move or sway to and fro or from side to side.
  2. to be moved or swayed powerfully with excitement, emotion, etc.
  3. Mining. (of sand or gravel) to be washed in a cradle.
  4. to dance to or play rock music.
  5. (of popular music) to have the driving beat characteristic of rock.
  6. Slang. to be very good, impressive, exciting, or effective: This show really rocks.
Show More
verb (used with object)
  1. to move or sway to and fro or from side to side, especially gently and soothingly: Oh, look! Her big brother is rocking the baby to sleep.
  2. to lull in security, hope, etc.
  3. to affect deeply; stun; move or sway powerfully, as with emotion: Everyone in the courtroom was rocked by the verdict.
  4. to shake or disturb violently: A thunderous explosion rocked the waterfront.
  5. Slang.
    1. to stir up; animate: We're gonna rock this joint tonight!
    2. to use, wear, or display in a showy, self-confident manner or to great effect: Only you could rock that hat! The game rocks some amazing new features.
  6. Graphic Arts. to roughen the surface of (a copperplate) with a rocker preparatory to scraping a mezzotint.
  7. Mining. cradle(def 22).
Show More
noun
  1. a rocking movement: the gentle rock of the boat.
  2. rock-'n'-roll(def 1).
Show More
adjective
  1. rock-'n'-roll(def 2).
Show More
Idioms
  1. rock the boat, Informal. to disrupt the smooth functioning or routine of something: Don't rock the boat by demanding special treatment from management.
Show More

Origin of rock2

before 1100; Middle English rocken, Old English roccian; cognate with Middle Dutch rocken; akin to German rücken; Old Norse rykkja to jerk
Related formsrock·a·ble, adjectiverock·ing·ly, adverbun·rocked, adjective

Synonyms

See more synonyms for on Thesaurus.com
1. roll, shake.

Synonym study

1. See swing1.

rock3

[rok]
noun
  1. striped bass.
Show More

Origin of rock3

First recorded in 1690–1700; short for rockfish

Rock

or Rock·y

[rok or rok-ee]
noun
  1. a male given name.
Show More
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

metal, rubble, lava, earth, gravel, slab, shake, convulse, shock, jolt, swing, sway, quarry, shelf, crust, promontory, mass, bedrock, reef, lodge

Examples from the Web for rock

Contemporary Examples

Historical Examples

  • On a rock, amid the roaring water, Lies Cassiopea's gentle daughter.

    Philothea

    Lydia Maria Child

  • "It was providential, your seeing the rock," he said to the engineer.

    Brave and Bold

    Horatio Alger

  • Mauburn felt the rock foundations of Manhattan Island to be crumbling to dust.

    The Spenders

    Harry Leon Wilson

  • He sprang to the rock, and exerted his utmost strength to dislodge it.

    Brave and Bold

    Horatio Alger

  • He threw himself against the rock and pushed with all the strength he could command.

    Brave and Bold

    Horatio Alger


British Dictionary definitions for rock

rock1

noun
  1. geology any aggregate of minerals that makes up part of the earth's crust. It may be unconsolidated, such as a sand, clay, or mud, or consolidated, such as granite, limestone, or coalSee also igneous, sedimentary, metamorphic
  2. any hard mass of consolidated mineral matter, such as a boulder
  3. mainly US, Canadian and Australian a stone
  4. a person or thing suggesting a rock, esp in being dependable, unchanging, or providing firm foundation
  5. British a hard sweet, typically a long brightly-coloured peppermint-flavoured stick, sold esp in holiday resorts
  6. slang a jewel, esp a diamond
  7. short for rock salmon
  8. (plural) slang the testicles
  9. slang another name for crack (def. 29)
  10. between a rock and a hard place having to choose between two equally unpleasant alternatives
  11. on the rocks
    1. in a state of ruin or destitution
    2. (of drinks, esp whisky) served with ice
Show More

Word Origin

C14: from Old French roche, of unknown origin

rock2

verb
  1. to move or cause to move from side to side or backwards and forwards
  2. to reel or sway or cause (someone) to reel or sway, as with a violent shock or emotion
  3. (tr) to shake or move (something) violently
  4. (intr) to dance in the rock-and-roll style
  5. mining to wash (ore) or (of ore) to be washed in a cradle
  6. (tr) to roughen (a copper plate) with a rocker before engraving a mezzotint
  7. (tr) slang, mainly US to impress by wearing (an item of clothing) or playing (a musical instrument)She can still rock a miniskirt; He rocks a guitar like nobody’s business
  8. rock the boat informal to create a disturbance in the existing situation
Show More
noun
  1. a rocking motion
  2. short for rock and roll
  3. Also called: rock music any of various styles of pop music having a heavy beat, derived from rock and roll
Show More
See also rock up

Word Origin

Old English roccian; related to Middle Dutch, Old High German rocken, German rücken

Rock

noun the Rock
  1. an informal name for Gibraltar
  2. a Canadian informal name for Newfoundland
Show More
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 rock

n.1

"stone, mass of mineral matter," c.1300, from Old English rocc (e.g. stanrocc "stone rock or obelisk") and directly from Old North French roque, which is cognate with Medieval Latin rocca (8c.), from Vulgar Latin *rocca, of uncertain origin, according to Klein sometimes said to be from Celtic (cf. Breton roch).

In Middle English it seems to have been used principally for rock formations as opposed to individual stones. Meaning "precious stone, especially a diamond," is 1908, U.S. slang. Meaning "crystallized cocaine" is attested from 1973, in West Coast U.S. slang. Figurative use for "sure foundation" (especially with reference to Christ) is from 1520s; but also from 1520s as "source of danger or destruction," in reference to shipwrecks (e.g. on the rocks). Also used attributively in names of animals that frequent rocky habitats, e.g. rock lobster (1843). Between a rock and a hard place first attested 1921:

to be between a rock and a hard place, vb. ph. To be bankrupt. Common in Arizona in recent panics; sporadic in California. ["Dialect Notes," vol. V, part iv, 1921]

Rock-ribbed is from 1776, originally of land; figurative sense of "resolute" first recorded 1887. Rock-happy (1945) was U.S. Pacific Theater armed forces slang for "mentally unhinged after too much time on one island." The rock-scissors-paper game is attested by that name from 1976; from 1968 as paper-stone-scissors. A 1967 source says it is based on Japanese Jan Ken Pon (or Janken for short), which is said to mean the same thing more or less.

Show More

v.1

"to sway," late Old English roccian "move a child gently to and fro," related to Old Norse rykkja "to pull, tear, move," Swedish rycka "to pull, pluck," Middle Dutch rucken, Old High German rucchan, German rücken "to move jerkily."

Meaning "cause to sway back and forth" is from late 13c. Intransitive sense from late 14c. For popular music senses, see rock (v.2). Related: Rocked; rocking. To rock the boat in the figurative sense "stir up trouble" is from 1914. Rock-a-bye first recorded 1805 in nursery rhyme.

Show More

v.2

"to dance to popular music with a strong beat," 1948 (first attested in song title "We're gonna rock"), from rock (v.1), in earlier blues slang sense of "to cause to move with musical rhythm" (1922); often used at first with sexual overtones (cf. 1922 song title "My Man Rocks Me (with One Steady Roll)"). Sense developed early 1950s to "play or dance to rock and roll music." Related: Rocked; rocking. Rocksteady, Jamaican pop music style (precursor of reggae), is attested from 1969.

Show More

n.2

"action of rocking; a movement to and fro," 1823, from rock (v.1). As short for rock and roll, by 1957; but sense of "musical rhythm characterized by a strong beat" is from 1946, in blues slang. Rock star attested by 1966.

Show More
Online Etymology Dictionary, © 2010 Douglas Harper

rock in Medicine

Rock

(rŏk)John 1890-1984
  1. American gynecologist and obstetrician who helped develop the first effective oral contraceptive in 1954.
Show More
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

rock in Science

rock

[rŏk]
  1. A relatively hard, naturally occurring mineral material. Rock can consist of a single mineral or of several minerals that are either tightly compacted or held together by a cementlike mineral matrix. The three main types of rock are igneous, sedimentary, and metamorphic.
  2. A piece of such material; a stone.
Show More
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Idioms and Phrases with rock

rock

In addition to the idioms beginning with rock

  • rock bottom
  • rocks in one's head, have
  • rock the boat

also see:

  • between a rock and a hard place
  • on the rocks
  • steady as a rock
Show More
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.