Used other than figuratively or idiomatically: see brain, damage. / (figuratively) stupidity

A net to catch birds.

plural of bramble net

(engineering) The horizontal bracing of a bridge, which prevents it from swaying.

Exhibiting low intelligence, as if having only half a brain.

(idiomatic) To struggle to think or remember something.

A wild goose, the brant.

plural of brand goose

(mathematics) A notation that denotes a number that is 1 if the condition in square brackets is satisfied, and 0 otherwise, i.e. (where P is a true or false statement)

Plain water, especially when mixed with alcoholic beverage.