Definitions for: Momentary

[adj] lasting for a markedly brief time; "a fleeting glance"; "fugitive hours"; "rapid momentaneous association of things that meet and pass"; "a momentary glimpse"

Webster (1913) Definition: Mo"men*ta*ry, a. [L. momentarius. See Moment.]
Done in a moment; continuing only a moment; lasting a very
short time; as, a momentary pang.

This momentary joy breeds months of pain. --Shak.

Synonyms: fleeting, fugitive, momentaneous, short