<p><strong>Noun</strong></p><ul><li>the act of combining or the state of being combined.</li><li>Synonyms: coalescence, union, conjunction, association.</li><li>a number of things combined: a combination of ideas.</li><li>Synonyms: amalgam, amalgamation, mixture.</li><li>something formed by combining: A chord is a combination of notes.</li><li>an alliance of persons or parties: a combination in restraint of trade.</li><li>Synonyms: conspiracy, cabal, monopoly, combine, cartel, coalition, league, federation, association, bloc.</li><li>the set or series of numbers or letters used in setting the mechanism of a combination lock.</li><li>the parts of the mechanism operated by this.</li><li>Often combinations: a suit of underwear in one piece.</li><li>Mathematics: the arrangement of elements into various groups without regard to their order in the group.</li><li>a group thus formed.</li><li>Compare permutation.</li></ul>