(baking) A small shortbread biscuit with a small amount of red jam in the centre.

plural of jam jar

A glass container for jam. / (Cockney rhyming slang) A car.

(music) A type of band that plays any of several styles of country-influenced folk-rock and is associated with a particular subculture known for following said bands to shows, trading recordings of them and keeping their fandom alive.

plural of jam band

Synonym of jam-packed

(UK) A small circular jam sandwich.

plural of jam penny

The situation where material becomes jammed in a machine.

plural of jam-up