# combination

## combination

[kom-buh-ney-shuhn]
noun
1.
the act of combining or the state of being combined.
2.
a number of things combined: a combination of ideas.
3.
something formed by combining: A chord is a combination of notes.
4.
an alliance of persons or parties: a combination in restraint of trade.
5.
the set or series of numbers or letters used in setting the mechanism of a combination lock.
6.
the parts of the mechanism operated by this.
7.
Often, combinations. a suit of underwear in one piece.
8.
Mathematics.
a.
the arrangement of elements into various groups without regard to their order in the group.
b.
a group thus formed. Compare permutation ( def 1 ).

Origin:
1350–1400; Middle English combinacyoun (< Middle French) < Late Latin combīnātiōn- (stem of combīnātiō), equivalent to combīnāt(us) combined (see combine, -ate1) + -iōn- -ion

intercombination, noun
noncombination, noun
precombination, noun
supercombination, noun

1. association, conjunction, union, coalescence, blending. 2. mixture, amalgamation, amalgam. 4. association, federation, league, coalition, cartel, combine, monopoly, bloc, cabal, conspiracy.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
 combination (ˌkɒmbɪˈneɪʃən) —n 1. the act of combining or state of being combined 2. a union of separate parts, qualities, etc 3. an alliance of people or parties; group having a common purpose 4. a.  the set of numbers that opens a combination lock b.  the mechanism of this type of lock 5. (Brit) a motorcycle with a sidecar attached 6. maths a.  an arrangement of the numbers, terms, etc, of a set into specified groups without regard to order in the group: the combinations of a, b, and c, taken two at a time, are ab, bc, ac b.  Compare permutation a group formed in this way. The number of combinations of n objects taken r at a time is n!/[(n -- r)!r!]. Symbol: nCr 7. the chemical reaction of two or more compounds, usually to form one other compound 8. chess a tactical manoeuvre involving a sequence of moves and more than one piece combi'national —adj

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

combination
1530s, from O.Fr. combination (14c., Mod.Fr. combinaison), from L.L. combinationem "a joining two by two," from combinare (see combine).
Online Etymology Dictionary, © 2010 Douglas Harper
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FOLDOC
Computing Dictionary

### combination definition

1. A set containing a certain number of objects selected from another set.
The number of combinations of r objects chosen from a set of n is
n C r = n! / ((n-r)! r!)
where "n C r" is normally with n and r as subscripts or as n above r in parentheses.
2. In the theory of combinators, a combination denotes an expression in which function application is the only operation.
(1995-04-10)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
But at this point, it is impossible to be certain of the exact effects of this
combination of drugs on his behavior.
The combination of aptness and familiarity means that clichés are constantly
occurring to a writer.
The index is a combination of three sub-indices covering wealth, health and
education.
Our mask and snorkel combination makes exploring the underwater world easy for
practiced divers or beginners.
Nearby Words