Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “sex”

sex

noun [U] (ACTIVITY)    /seks/
B1 physical activity between people involving the sexual organs : Sex before/ outside marriage is strongly disapproved of in some cultures . She was complaining about all the sex and violence on television . She'd been having sex with a colleague at work for years . Most young people now receive sex education at school . extramarital / premarital sex casual sex (= sex with someone you do not know ) unprotected sex (= sex without using something to prevent disease or becoming pregnant )Sexual intercourse
(Definition of sex noun (ACTIVITY) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of sex

Definitions of “sex” in other dictionaries

Word of the Day

scramble

to mix eggs with a little milk and mix again as they are being fried

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