Third-person singular simple present indicative form of main

(Scotland) The farm attached to a mansion house.

(chiefly Britain) The domestic electrical power supply. / The pipes of a centralized water supply that transport the water to individual buildings. / The main course of a meal.

(now literary, archaic) Powerful; mighty.

present participle of main

(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.