1 [adj. kom-pound, kom-pound; n. kom-pound; v. kuhm-pound, kom-pound]
composed of two or more parts, elements, or ingredients: Soap is a compound substance.
having or involving two or more actions or functions: The mouth is a compound organ.
Grammar. of or pertaining to a compound sentence or compound-complex sentence.
consisting of two or more parts that are also bases, as housetop, many-sided, playact, or upon.
consisting of any two or more parts that have identifiable meaning, as a base and a noninflectional affix (return, follower ), a base and a combining form (biochemistry ), two combining forms (ethnography ), or a combining form and a noninflectional affix (aviary, dentoid ).
(of a verb tense) consisting of an auxiliary verb and a main verb, as are swimming, have spoken, or will write (opposed to simple ).
Botany. composed of several similar parts that combine to form a whole: a compound fruit.
Zoology. composed of a number of distinct individuals that are connected to form a united whole or colony, as coral.
Music. of or pertaining to compound time.
Machinery. noting an engine or turbine expanding the same steam or the like in two successive chambers to do work at two ranges of pressure.
something formed by compounding or combining parts, elements, etc.
Chemistry. a pure substance composed of two or more elements whose composition is constant.
a compound word, especially one composed of two or more words that are otherwise unaltered, as moonflower or rainstorm.
verb (used with object)
to put together into a whole; combine: to compound drugs to form a new medicine.
to make or form by combining parts, elements, etc.; construct: to compound a new plan from parts of several former plans.
to make up or constitute: all the organs and members that compound a human body.
to settle or adjust by agreement, especially for a reduced amount, as a debt.
Law. to agree, for a consideration, not to prosecute or punish a wrongdoer for: to compound a crime or felony.
to pay (interest) on the accrued interest as well as the principal: My bank compounds interest quarterly.
to increase or add to: The misery of his loneliness was now compounded by his poverty.
Electricity. to connect a portion of the field turns of (a direct-current dynamo) in series with the armature circuit.
verb (used without object)
to make a bargain; come to terms; compromise.
to settle a debt, claim, etc., by compromise.
to form a compound.

1350–1400; (v.) Middle English compounen < Middle French compon- (stem of compondre) < Latin compōnere, equivalent to com- com- + pōnere to put; (adj.) Middle English compouned, past participle of compounen, as above

compoundable, adjective
compoundedness, noun
compounder, noun
noncompoundable, adjective
uncompoundable, adjective
uncompounded, adjective
uncompounding, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
1.  a substance that contains atoms of two or more chemical elements held together by chemical bonds
2.  any combination of two or more parts, aspects, etc
3.  a word formed from two existing words or combining forms
4.  to mix or combine so as to create a compound or other product
5.  to make by combining parts, elements, aspects, etc: to compound a new plastic
6.  to intensify by an added element: his anxiety was compounded by her crying
7.  finance to calculate or pay (interest) on both the principal and its accrued interest
8.  (also intr) to come to an agreement in (a quarrel, dispute, etc)
9.  (also intr) to settle (a debt, promise, etc) for less than what is owed; compromise
10.  law to agree not to prosecute in return for a consideration: to compound a crime
11.  electrical engineering to place duplex windings on the field coil of (a motor or generator), one acting as a shunt, the other being in series with the main circuit, thus making the machine self-regulating
12.  composed of or created by the combination of two or more parts, elements, etc
13.  (of a word) consisting of elements that are also words or productive combining forms
14.  (of a sentence) formed by coordination of two or more sentences
15.  (of a verb or the tense, mood, etc, of a verb) formed by using an auxiliary verb in addition to the main verb: the future in English is a compound tense involving the use of such auxiliary verbs as ``shall'' and ``will''
16.  music
 a.  denoting a time in which the number of beats per bar is a multiple of three: six-four is an example of compound time
 b.  (of an interval) greater than an octave
17.  zoology another word for colonial
18.  (of a steam engine, turbine, etc) having multiple stages in which the steam or working fluid from one stage is used in a subsequent stage
19.  (of a piston engine) having a turbocharger powered by a turbine in the exhaust stream
[C14: from earlier compounen, from Old French compondre to collect, set in order, from Latin compōnere]

compound2 (ˈkɒmpaʊnd)
1.  (esp formerly in South Africa) an enclosure, esp on the mines, containing the living quarters for Black workers
2.  any similar enclosure, such as a camp for prisoners of war
3.  (formerly in India, China, etc) the enclosure in which a European's house or factory stood
[C17: by folk etymology (influenced by compound1) from Malay kampong village]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

"to put together," late 14c., from O.Fr. compon(d)re "arrange, direct," from L. componere "to put together" (see composite). The -d appeared 1500s on model of expound, etc. The adj. is c.1400; compound eye is attested from 1836; compound sentence is from 1772. The noun
meaning "a compound thing" is from 1530.

1679, from Du. (kampoeng) or Port., from Malay kampong "village, group of buildings." Spelling infl. bycompound (v.). Originally, "the enclosure for a factory or settlement of Europeans in the East," later used of S.African diamond miners' camps (1893), then of large fenced-in spaces generally (1946).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

compound com·pound (kŏm'pound')

  1. A combination of two or more elements or parts.

  2. A pure, macroscopically homogeneous substance that consists of atoms or ions of different elements in definite proportions that cannot be separated by physical means, and that have properties unlike those of its constituent elements.

adj. (kŏm'pound', kŏm-pound', kəm-)
Consisting of two or more substances, ingredients, elements, or parts. v. com·pound·ed, com·pound·ing, com·pounds (kŏm-pound', kəm-, kŏm'pound')
  1. To combine so as to form a whole; mix.

  2. To produce or create by combining two or more ingredients or parts.

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
Science Dictionary
compound   (kŏm'pound')  Pronunciation Key 
A substance consisting of atoms or ions of two or more different elements in definite proportions joined by chemical bonds into a molecule. The elements cannot be separated by physical means. Water, for example, is a compound having two hydrogen atoms and one oxygen atom per molecule.

Adjective   Composed of more than one part, as a compound eye or leaf.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

compound definition

In chemistry, a substance containing two or more elements in definite proportions.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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