Su-pĕr'flu-ous, a.

a. [Lat. superfluus, overflowing, from superfluere, to overflow; It., Sp., & Pg. superfluo, Pr. superflu, superfluos, Fr. superflu. See SUPERFLUENCE.] More than is wanted or sufficient; rendered unnecessary by superabundance; unnecessary; useless; needless; excessive. “An authority which makes all further argument or illustration superfluous.” E. Everett.

Superfluous interval (Mus.), an interval that exceeds the regular diatonic interval. — Superfluous polygamy (Bot.), a kind of inflorescence or compound flower, in which the florets of the disk are hermaphrodite and fertile, and those of the ray, though female or pistilliferous only, are also fertile. — Superfluous sound or tone (Mus.), a sound or tone which contains a semitone minor more than a tone.

Synonyms—Unnecessary; useless; exuberant; redundant; needless.