Dictionary![]() ![]() com•bi•na•tionPronunciation: (kom"bu-nā'shun), [key] —n. 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. Math. a. the arrangement of elements into various groups without regard to their order in the group. b. a group thus formed. Cf. permutation (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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