combinations

UK: /ˌkɒmbɪˈneɪʃənz/

Collins Concise English Dictionary © HarperCollins Publishers::

combinations / ˌkɒmbɪˈneɪʃənz/ noun:plural

1. a one-piece woollen undergarment with long sleeves and legs
   Often shortened to: combs, coms

WordReference Random House Learner's Dictionary of American English © 2026

com•bi•na•tion /ˌkɑmbəˈneɪʃən/   n. 

1. [uncountable] the act of combining or the state of being combined.
2. a number of things combined:
   [countable] a combination of ideas.
3. [countable] something formed by combining:
   A chord is a combination of notes.
4. the set of numbers or letters used to open a lock or a safe:
   [countable] He forgot the combination to his locker.

WordReference Random House Unabridged Dictionary of American English © 2026

com•bi•na•tion  (kom′bə nā′shən), 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. Clothing Often, combinations. a suit of underwear in one piece.
8. Mathematics
   • the arrangement of elements into various groups without regard to their order in the group.
   • a group thus formed. Cf. permutation (def. 1).

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

com′bi•na′tion•al, adj. 
Synonyms

• 1. association, conjunction, union, coalescence, blending.
• 2. mixture, amalgamation, amalgam.
• 4. association, federation, league, coalition, cartel, combine, monopoly, bloc, cabal, conspiracy.