[ rok-er ]
/ ˈrɒk ər /


Nearby words

  1. rockefeller,
  2. rockefeller, john d.,
  3. rockefeller, john davison,
  4. rockefeller, nelson,
  5. rockefeller, nelson aldrich,
  6. rocker arm,
  7. rocker cam,
  8. rocker panel,
  9. rockery,
  10. rocket


    off one's rocker, Slang. insane; crazy: You're off your rocker if you think I'm going to climb that mountain.

Origin of rocker

1400–50; late Middle English: one who rocks a cradle; see rock2, -er1

Origin of rock

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

Synonym study

1. See swing1. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for rocker

British Dictionary definitions for rocker


/ (ˈrɒkə) /



/ (rɒk) /


Word Origin for rock

C14: from Old French roche, of unknown origin


/ (rɒk) /



See also rock up

Word Origin for rock

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


/ (rɒk) /

noun the Rock

an informal name for Gibraltar
a Canadian informal name for Newfoundland
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 rocker
Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for rocker


[ rŏk ]
John 1890-1984

American gynecologist and obstetrician who helped develop the first effective oral contraceptive in 1954.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for rocker


[ rŏk ]

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.
A piece of such material; a stone.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Idioms and Phrases with rocker


see off one's head (rocker).


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
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.