Standard Lemma guide

fly-by-night

noun · 7 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • Australia: Recorded audio is listed in the source snapshot.

1

noun

Meaning 1

A creature which flies at night; a nocturnal flier or traveler.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

One who departs or flees at night in order to avoid creditors, law enforcement etc.

Definition source: English Wiktionary via Wiktextract

Usage: attributive, often

Examples

  • Do not give your credit card number to that fly-by-night operation.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

A person or business that appears and/or disappears rapidly, appearing untrustworthy, or giving an impression of transience.

Definition source: English Wiktionary via Wiktextract

Usage: derogatory, idiomatic

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

A traveling businessman or tradesman.

Definition source: English Wiktionary via Wiktextract

Usage: derogatory, idiomatic

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

adjective satellite

Meaning 5

ephemeral

Definition source: Princeton WordNet 3.0

Examples

  • the symphony is no fly-by-night venture

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

adjective satellite

Meaning 6

(of businesses and businessmen) unscrupulous

Definition source: Princeton WordNet 3.0

Examples

  • a shady operation

Meaning relationships

Synonyms: shady

Antonyms: none provided

7

noun

Meaning 7

a debtor who flees to avoid paying

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: debtor, debitor

History

Etymology

No etymology was provided for this word.