Su`per*flu"i*ty\, n.; pl. Superfluities. [L. superfluit['e], L. superfluitas. See Superfluous.]1. A greater quantity than is wanted; superabundance; as, a superfluity of water; a superfluity of wealth. A quiet mediocrity is still to be preferred before a troubled superfluity. --Suckling. 2. The state or quality of being superfluous; excess. "By a superfluity abominable." --Chaucer. 3. Something beyond what is needed; something which serves for show or luxury. Syn: Superabundance; excess; redundancy.