Principally; on the whole; for the most part.

simple past tense and past 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.

(now literary, archaic) Powerful; mighty.

present participle of main

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

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

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

(linear algebra) The entries of a square matrix from the top left to the bottom right.