A pipe conveying water to extinguish a fire.

plural of main wheel

Any of the main wheels of a device (such as an aircraft or wheelchair) that has multiple wheels.

plural of main street

the principal street of a town, but not necessarily named "Main Street" (qv); there can be more than one main street in some towns.

(poker) The pot that contains the chips bet and raised by each player, up to the same amount wagered by the player all-in with the least amount of chips. Further bets and raises form the side pot or side pots.

plural of main pot

An older English form of Frankfurt am Main.

(US, slang) The primary woman that a man is romantically involved with / (by extension) Something or someone of great importance.

A general contractor.