Chemistry .

a salt of hydrobromic acid consisting of two elements, one of which is bromine, as sodium bromide, NaBr.

a compound containing bromine, as methyl bromide.

Pharmacology . potassium bromide, known to produce central nervous system depression, formerly used as a sedative.

a platitude or trite saying.

a person who is platitudinous and boring.

noun

banality , commonplace , platitude , stereotype , truism , cliche , compound , saw , sedative , trite