Table of Contents POS
WORDNET DICTIONARY
THESAURUS

WORDNET DICTIONARY

Noun fly-by-night has 1 sense

• fly-by-night(n = noun.person) Array - a debtor who flees to avoid paying; Array
is a kind of debitor, debtor
Derived forms adjective fly-by-night₂, adjective fly-by-night₁

Adjective fly-by-night has 2 senses

• fly-by-night(s = adj.all) shady - (of businesses and businessmen) unscrupulous; "a shady operation"
Derived form noun fly-by-night₁

• fly-by-night(s = adj.all) Array - ephemeral; "the symphony is no fly-by-night venture"
Derived form noun fly-by-night₁

THESAURUS

fly-by-night

brittle, capricious, changeable, corruptible, deciduous, dying, ephemeral, evanescent, fading, fickle, fleeting, flitting, flying, fragile, frail, fugacious, fugitive, impermanent, impetuous, impulsive, inconstant, insubstantial, irresponsible, momentary, mortal, mutable, nondurable, nonpermanent, passing, perishable, short-lived, temporal, temporary, transient, transitive, transitory, trustless, undependable, undurable, unenduring, unfaithworthy, unreliable, unstable, unsure, untrustworthy, untrusty, volatile

For further exploring for "fly-by-night" in Webster Dictionary Online