Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “fly-by-night”

fly-by-night

adjective [not gradable]  /ˈflɑɪ·bɑɪˌnɑɪt/ disapproving us  
(esp. of a business) not able to be trusted, and likely to stop operating without any notice: a fly-by-night operation
(Definition of fly-by-night from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of fly-by-night?
Add Cambridge dictionaries to your browser to your website

Definitions of “fly-by-night” in other dictionaries

Translations of “fly-by-night”

Word of the Day

maiden

a girl or young woman

Word of the Day

Countability – grammar codes

by Dom Glennon​​,
November 26, 2014
Advices and informations Have you ever noticed strange codes in square brackets on entries in Cambridge Dictionaries Online and wondered what they mean? These are grammar codes, giving you a brief summary of how that word behaves grammatically. More information can be obtained by hovering your cursor over the code, and there’s

Read More 

ped-text verb

November 24, 2014
to text someone while walking I’m ped-texting, I’m looking down at my phone, 75 percent of the time.

Read More