1 [druhm]
noun, plural drums, (especially collectively for 11) drum.
a musical percussion instrument consisting of a hollow, usually cylindrical, body covered at one or both ends with a tightly stretched membrane, or head, which is struck with the hand, a stick, or a pair of sticks, and typically produces a booming, tapping, or hollow sound.
any hollow tree or similar object or device used in this way.
the sound produced by such an instrument, object, or device.
any rumbling or deep booming sound.
a natural organ by which an animal produces a loud or bass sound.
any cylindrical object with flat ends.
a cylindrical part of a machine.
a cylindrical box or receptacle, especially a large, metal one for storing or transporting liquids.
Also called tambour. Architecture.
any of several cylindrical or nearly cylindrical stones laid one above the other to form a column or pier.
a cylindrical or faceted construction supporting a dome.
any of several marine and freshwater fishes of the family Sciaenidae that produce a drumming sound.
Also called drum memory. Computers. magnetic drum.
Archaic. an assembly of fashionable people at a private house in the evening.
a person who plays the drum.
Australian Informal. reliable, confidential, or profitable information: to give someone the drum.
verb (used without object), drummed, drumming.
to beat or play a drum.
to beat on anything rhythmically, especially to tap one's fingers rhythmically on a hard surface.
to make a sound like that of a drum; resound.
(of ruffed grouse and other birds) to produce a sound resembling drumming.
verb (used with object), drummed, drumming.
to beat (a drum) rhythmically; perform by beating a drum: to drum a rhythm for dancers.
to call or summon by, or as if by, beating a drum.
to drive or force by persistent repetition: to drum an idea into someone.
to fill a drum with; store in a drum: to drum contaminated water and dispose of it.
Verb phrases
drum out,
(formerly) to expel or dismiss from a military service in disgrace to the beat of a drum.
to dismiss in disgrace: He was drummed out of the university for his gambling activities.
drum up,
to call or summon by, or as if by, beating a drum.
to obtain or create (customers, trade, interest, etc.) through vigorous effort: They were unable to drum up enthusiasm for the new policies.
to concoct; devise: to drum up new methods of dealing with urban crime.
beat the drum, to promote, publicize, or advertise: The boss is out beating the drum for a new product.

1535–45; back formation from drumslade drum, drummer, alteration of Dutch or Low German trommelslag drumbeat, equivalent to trommel drum + slag beat (akin to slagen to beat; cognate with slay)

underdrumming, noun
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2 [druhm]
noun Scot., Irish English.
a long, narrow hill or ridge.

1715–25; < Irish and Scots Gaelic druim

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
drum1 (drʌm)
1.  music a percussion instrument sounded by striking a membrane stretched across the opening of a hollow cylinder or hemisphere
2.  informal beat the drum for to attempt to arouse interest in
3.  the sound produced by a drum or any similar sound
4.  an object that resembles a drum in shape, such as a large spool or a cylindrical container
5.  architect
 a.  one of a number of cylindrical blocks of stone used to construct the shaft of a column
 b.  the wall or structure supporting a dome or cupola
6.  short for eardrum
7.  Also called: drumfish any of various North American marine and freshwater sciaenid fishes, such as Equetus pulcher (striped drum), that utter a drumming sound
8.  a type of hollow rotor for steam turbines or axial compressors
9.  computing See disk a rotating cylindrical device on which data may be stored for later retrieval: now mostly superseded by disks
10.  archaic a drummer
11.  informal (Austral) the drum the necessary information (esp in the phrase give (someone) the drum)
vb (sometimes foll by up) , drums, drumming, drummed
12.  to play (music) on or as if on a drum
13.  to beat or tap (the fingers) rhythmically or regularly
14.  (intr) (of birds) to produce a rhythmic sound, as by beating the bill against a tree, branch, etc
15.  to summon or call by drumming
16.  (tr) to instil by constant repetition: to drum an idea into someone's head
[C16: probably from Middle Dutch tromme, of imitative origin]

drum2 (drʌm)
(Scot), (Irish) a narrow ridge or hill
[C18: from Scottish Gaelic druim]

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

early 15c., from M.Du. tromme "drum," probably of imitative origin. Not common before 1570s. To drum up (business, etc.) is Amer.Eng. 1839, from the old way of drawing a crowd.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

drum (drŭm)
See eardrum.

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

drum definition

Ancient slow, cylindrical magnetic media that were once state-of-the-art storage devices. Under BSD Unix the disk partition used for swapping is still called "/dev/drum"; this has led to considerable humour and not a few straight-faced but utterly bogus "explanations" getting foisted on newbies.
See also "The Story of Mel".

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
IN the old wars drum of hoofs and the beat of shod feet.
It also had a drum sound that would beat each time the total population
  increased by some amount.
They will continue to beat this drum, have no doubt.
If their team is off to a fast start, the drum beat is loud.
Images for drum
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