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. combination lock a lock that can be opened only by a specific sequence of movements. combinative adj. combinational adj. combinatory adj.
[ obs. F combination or LL combinatio (as COMBINE) ]