Su‐per″flu‐ous (?), 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.
An authority which makes all further argument or illustration superfluous. E. Everett.
Superfluous interval(Mus.), an interval that exceeds a major or perfect interval by a semitone.
Syn. — Unnecessary; useless; exuberant; excessive; redundant; needless.
— Su‐per″flu‐ous‐ly, adv. — Su‐per″flu‐ous‐ness, n.