Principally; on the whole; for the most part.

Alternative form of in the main

(now literary, archaic) Powerful; mighty.

present participle of main

(Internet slang) Expressed openly when one might normally desire privacy or anonymity.

(US, nonstandard, used in business names or titles) Authentic to the U.S. state of Maine.

The mainland coast of Spanish America.

The most important building of a group of buildings (e.g. in a school/university).

The generic street name (and often the official name) of the primary retail street of a village, town, or small city in the United States, Canada, Ireland, some parts of Scotland and also in some countries in central Europe.

(nautical) On a wooden mast, a circular disc (or sometimes a rectangle) of wood near or at the top of the mast, usually with holes or sheaves to reeve signal halyards; also a temporary or emergency place for a lookout.