transient
1. tran.sient \-*nt\ aj [L transeunt-, transiens, prp. of transire to go across, pass], fr. trans- + ire to go - more at ISSUE 1a: passing esp. quickly into and out of existence : TRANSITORY, (MSHORT-LIVED 1b: passing through or by a place with only a brief stay or sojourn 2: affecting something or producing results beyond itself FLEETING, EVANESCENT: TRANSIENT applies to what is short in duration and passes quickly; TRANSITORY suggests the inevitability of changing, ending, or dying out; EPHEMERAL implies striking brevity of life or duration; MOMENTARY suggests coming and going quickly and being therefore merely a brief interruption of a more enduring state; FUGITIVE and FLEETING imply passing so quickly as to make apprehending difficult; EVANESCENT suggests vanishing almost as it comes and may connote an airy or fragile quality - tran.sient.ly av SYN syn TRANSITORY, EPHEMERAL, MOMENTARY, FUGITIVE, 2. transient n 1: one that is transient : as 1a: a transient guest 1b: a person traveling about usu. in search of work 2a: a temporary oscillation that occurs in a circuit because of a sudden ch ange of voltage or of load 2b: a transient current or voltage
 Webster's English Dictionary
 Webster's English Dictionary