MAIN
—adjective. 1 chief, principal. 2 exerted to the full (by main force). —none. 1 principal duct etc. For water, sewage, etc. 2 (usually. In pl.; prec. By the) a central distribution network for electricity, gas, water, etc. B domestic electricity supply as distinct from batteries. 3 poet. High seas (spanish main). ? in the main mostly. [old english]