a. [ L. superfluus overflowing; super over, above + fluere to flow. See Super-, and Fluent. ] More than is wanted or is sufficient; rendered unnecessary by superabundance; unnecessary; useless; excessive; as, a superfluous price. Shak. [ 1913 Webster ]

An authority which makes all further argument or illustration superfluous. E. Everett. [ 1913 Webster ]

Superfluous interval (Mus.), an interval that exceeds a major or perfect interval by a semitone. [ 1913 Webster ]

Syn. -- Unnecessary; useless; exuberant; excessive; redundant; needless. [ 1913 Webster ]

-- Su*per"flu*ous*ly, adv. -- Su*per"flu*ous*ness, n. [ 1913 Webster ]