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Webster 1913 Edition

Noun.

The act or state of vanishing away; disappearance;

as, the

evanescence

of vapor, of a dream, of earthly plans or hopes

Rambler.

Noun.

[L. evanescens, from evanesco; e and vanesco, to vanish, from vanus, vain, empty. See Vain.]

A vanishing; a gradual departure from sight or possession, either by removal to a distance, or by dissipation, as vapor.

The state of being liable to vanish and escape possession.

See also: evanescence

évanescence f ‎(uncountable)