"transient" in the noun sense
1. transient
one who stays for only a short time
"transient laborers"
2. transient
physics) a short-lived oscillation in a system caused by a sudden change of voltage or current or load
"transient" in the adjective sense
1. transeunt, transient
of a mental act causing effects outside the mind
2. ephemeral, passing, short-lived, transient, transitory, fugacious
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"
Source: WordNet® (An amazing lexical database of English)
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