the outer edge, border, margin, or brink of something, especially of a circular object.
any edge, margin, or frame added to or around a central object or area.
the outer circle of a wheel, attached to the hub by spokes.
a circular strip of metal forming the connection between an automobile wheel and tire, either permanently attached to or removable from the wheel.
a drive wheel or flywheel, as on a spinning mule.
Basketball. the metal ring from which the net is suspended to form the basket.
Journalism. the outer edge of a usually U -shaped copy desk, occupied by the copyreaders. Compare slot ( def 5 ).
Metallurgy. (in an ingot) an outer layer of metal having a composition different from that of the center.
verb (used with object), rimmed, rimming.
to furnish with a rim, border, or margin.
(of a golf ball or putt) to roll around the edge of (a hole) but not go in.
Basketball. (of a basketball) to roll around (the rim of the basket) and not go in.
to coat or encrust the rim of (a glass): Rim each cocktail glass with salt.

before 1150; Middle English; Old English -rima (in compounds); cognate with Old Norse rimi raised strip of land, ridge

rimless, adjective

1. lip, verge. Rim, brim refer to the boundary of a circular or curved area. A rim is a line or surface bounding such an area; an edge or border: the rim of a glass. Brim usually means the inside of the rim, at the top of a hollow object (except of a hat), and is used particularly when the object contains something: The cup was filled to the brim.

1. center.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
rim (rɪm)
1.  the raised edge of an object, esp of something more or less circular such as a cup or crater
2.  the peripheral part of a wheel, to which the tyre is attached
3.  basketball the hoop from which the net is suspended
vb , rims, rimming, rimmed
4.  to put a rim on (a pot, cup, wheel, etc)
5.  slang to lick, kiss, or suck the anus of (one's sexual partner)
6.  ball games (of a ball) to run around the edge of (a hole, basket, etc)
[Old English rima; related to Old Saxon rimi, Old Norse rimi ridge]

abbreviation for
Mauritania (international car registration)
[From République Islamique de Mauritanie]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

O.E. rima "edge, border," as in særima "seashore," lit. "rim of the sea," and dægrima "dawn," lit. "rim of the day." Related to O.N. rime, rimi "a raised strip of land, ridge." No known cognates in other languages. The snare drummer's rim shot is recorded from 1934.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

rim (rĭm)
The border, edge, or margin of an organ or a part.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Abbreviations & Acronyms
Mauritania (international vehicle ID)
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences for rim
Players often try to put a steady backspin on the ball to deaden its impact with the rim.
The heads are held on with a wooden rim and, traditionally, linen ropes.
Its upper surface or lid, the mercy seat was surrounded with a rim of gold.
In contrast, rim had spent years and millions of dollars developing its invention.
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