Of chief or leading importance; prime, principal. / Chief, most important, or principal in extent, size, or strength; consisting of the largest part.

(Britain, dialectal) Exceedingly, extremely, greatly, mightily, very, very much.

(transitive, slang) Short for mainline (“to inject (a drug) directly into a vein”). / (transitive, gaming) To mainly play a specific character or side, or with specific equipment, during a game.

That which is chief or principal; the chief or main portion; the bulk, the greater part, gross.

(obsolete, gaming) A hand or match in a game of dice.

(obsolete, rare) A basket for gathering grapes.

plural of main

(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.

Third-person singular simple present indicative form of main

(Scotland) The farm attached to a mansion house.