(idiomatic) One's own idea or conception.

(rail transport) A secondary railroad route or one subsidiary to a railroad's mainlines.

A plant species of the genus Rubus, Rubus saxatilis.

(slang) To shoot in the head.

plural of brain trust

plural of brains trust

Either of the two characters { and }, i.e., left curly bracket { and right curly bracket }, with the shape of a curved, pointed line, having various uses in math, music, computer programming and chemistry.

plural of brand-name

plural of brain fart

A hollow metal cylinder, attached to a wheel of a vehicle, to which pressure is applied when braking.