1. 
[syn: ephemeral, passing, short-lived, transient, transitory, fugacious]
The Collaborative International Dictionary of English v.0.48:
Short-lived \Short"-lived`\, a.
   Not living or lasting long; being of short continuance; as, a
   short-lived race of beings; short-lived pleasure; short-lived
   passion.
   [1913 Webster]
WordNet (r) 3.0 (2006):
short-lived
    adj 1: lasting a very short time; "the ephemeral joys of
           childhood"; "a passing fancy"; "youth's transient
           beauty"; "love is transitory but it is eternal";
           "fugacious blossoms" [syn: ephemeral, passing,
           short-lived, transient, transitory, fugacious]