Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “all's fair in love and war”

all's fair in love and war

saying
in love and war you do not have to obey the usual rules about reasonable behaviourJustice and fairness
(Definition of all's fair in love and war from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
Add Cambridge dictionaries to your browser to your website

Word of the Day

sling

to throw or drop something carelessly

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More