n. In music: The third variety of note used by medieval musicians, having one half or one third the value or duration of a long note, or longa: its form was (.b) In modern notation, the longest note used, having double the duration of a semibreve.n. In law, a writ; a brief.n. In writing and printing, a mark (˘) used to indicate that the vowel over which it is placed is short.n. In prosody, a short syllable.n. [⟨ F. bref, fem, brève, short; from their short tails.] A name sometimes given to the ant-thrushes of the family Pittidæ. Also called brachyure. See Brachyurus, 2.To write down; describe.To enter in a book; book; brief.To tell; say.