n.1 the act or an instance of combining; the process of being combined.
2 a combined state (in combination with).
3 a combined set of things or people.
4 a sequence of numbers or letters used to open a combination lock.
5 Brit. a motor cycle with side-car attached.
6 (in pl.) Brit. a single undergarment for the body and legs.
7 a group of things chosen from a larger number without regard to their arrangement.
8 a united action. b Chess a coordinated and effective sequence of moves.
9 Chem. a union of substances in a compound with new properties.
Phrases and idioms:
combination lock a lock that can be opened only by a specific sequence of movements.
Derivatives:
combinative adj. combinational adj. combinatory adj.
Etymology: obs. F combination or LL combinatio (as COMBINE)