Definitions from Wiktionary ( )

▸ adjective:  Of chief or leading importance; prime, principal.
▸ adjective:  Chief, most important, or principal in extent, size, or strength; consisting of the largest part.
▸ adjective:  (archaic, of force, strength, etc.) Full, sheer, undivided.
▸ adjective:  (dialectal) Big; angry.
▸ adjective:  (nautical) Belonging to or connected with the principal mast in a vessel.
▸ adjective:  (obsolete) Great in size or degree; important, powerful, strong, vast.
▸ adverb:  (British, dialectal) Exceedingly, extremely, greatly, mightily, very, very much.
▸ verb:  (transitive, gaming) To mainly play a specific character or side, or with specific equipment, during a game.
▸ verb:  (obsolete) To convert (a road) into a main or primary road.
▸ noun:  (not in generic modern use) That which is chief or principal; the chief or main portion; the bulk, the greater part, gross.
▸ noun:  (video games) The primary character that one plays in a video game in which one can play more than one character.
▸ noun:  A large cable or pipe providing utility service to an area or a building, such as a water main or electric main.
▸ noun:  (now poetic) The high seas.
▸ noun:  (now archaic, US dialectal) The mainland.
▸ noun:  (obsolete, except in might and main) Force, power, strength, violent effort.
▸ noun:  (obsolete, gaming) A hand or match in a game of dice.
▸ noun:  (obsolete, gaming) The largest throw in a match at dice; in the game of hazard, a number from one to nine called out by a person before the dice are thrown.
▸ noun:  (obsolete, gaming) A stake played for at dice.
▸ noun:  (obsolete, gaming, sports) A sporting contest or match, especially a cockfighting match.
▸ noun:  A banker's shovel for coins.
▸ noun:  (obsolete, rare) A basket for gathering grapes.
▸ noun:  A river in southern Germany, flowing from Bavaria to the Rhine.
▸ noun:  A river in Northern Ireland, flowing into Lough Neagh.
▸ noun:  A surname.
▸ verb:  (transitive, slang) Short for mainline (“to inject (a drug) directly into a vein”). [(slang) To inject (a drug) directly into a vein.]
▸ noun:  (informal) Short for main course (“the principal dish of a meal”). [The main serving or dish of a meal, usually cooked.]
▸ noun:  (nautical) Short for mainsail. [(nautical) The largest (or only) sail on a sailing vessel.]
▸ noun:  Ellipsis of Main Street.: A street named "Main Street". [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.]
▸ noun:  Ellipsis of Main Street (“main street”).: A central street of a community [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.]

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