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.

present participle of main

(now literary, archaic) Powerful; mighty.

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

(grammar) A clause that can stand alone syntactically as a complete sentence and contains at least a subject and a verb.

(grammar) The verb in a clause with the highest semantic content.

The principal pipe, usually underground, for conveying water to residential and business properties.

(computing) The primary volatile memory of a computer, not including memory cache, persistent disk storage, or external storage.