(US slang) A needle for (illicit) drug administration.

plural of maintenance window

(nonstandard) superlative form of main: most main

(humorous) The use of physical concussion, such as a knock or a tap, in an attempt to make a malfunctioning device work.

A region in southwest British Columbia, Canada, including Vancouver and its outlying municipalities.

manhole

Not requiring any maintenance.

plural of mainchain

(nautical, usually in the plural) A chain securing the lower shrouds of the mainmast. / (cryptocurrencies) A blockchain with one or more sidechains attached to it.

plural of maincrop