Below are possible answers for the crossword clue Fly-by-night.
9 letter answer(s) to fly-by-night
TRANSIENT
(physics) a short-lived oscillation in a system caused by a sudden change of voltage or current or load
fleeting
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"
of a mental act; causing effects outside the mind
one who stays for only a short time; "transient laborers"
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