Cŏm'bi-nā'tion, n.

n. [L. Lat. combinatio, Fr. combinaison. See infra.] In general, close union or connection. Hence, 1. The union of persons or things to effect some purpose, or that tends to bring about some result; association; alliance. “To withstand a combination of the most powerful men in Rome.” Melmoth. A solemn combination shall be made Of our dear souls. Shak.

2. (Chem.) Union by affinity. “Making new compounds by new combinations.” Boyle.
3. (Math.) The alternations or variations of any number of quantities, in all possible ways. Hutton.

Combination room, in the University of Cambridge, Eng., a room into which the fellows withdraw after dinner, for wine, dessert, and conversation. Syn. — Cabal; alliance; union; confederacy; coalition; conspiracy. See CABAL.