Definition of Sex
Quick Meaning of Sex
Whether someone or an animal is male or female; the physical difference between males and females.
Detailed Definition of Sex
The biological characteristic of being male or female; either of the two divisions of humans or animals based on reproductive function.
How to Pronounce Sex
Stress pattern: O (1-syllable word).
Tip: /sɛks/ rhymes with 'decks'. The 'e' is short, like in 'best', not long like in 'see'.
Origin and Etymology of Sex
From Latin 'sexus' meaning gender or sex, originally from 'secare' meaning to divide.
How to Use Sex in a Sentence
Each example shows “sex” with a CEFR level so learners can pick examples that match their fluency.
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“The survey asked about sex and age.”
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“The biological sex of the baby was determined before birth.”
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“Sex discrimination in the workplace is illegal in most countries.”
Synonyms and Antonyms of Sex
Common Synonyms for Sex
Smart Synonyms for Sex — When to Use Each
- gender
- for social roles and identity beyond biological sex
- biological trait
- for describing reproductive characteristics formally
Common Collocations with Sex
These phrases pair with “sex” in everyday English:
- biological sex
- opposite sex
- sex differences
- same sex
- sex education
Common Mistakes When Using Sex
Even fluent speakers slip up with “sex”. Here’s how to avoid the most common errors:
- ✗ Wrong: What is your sex? I am girl.
- ✓ Correct: What is your sex? I am female.
- Why: Use 'female' or 'male' as adjectives after 'am'. 'Girl' and 'boy' are nouns meaning young people.
- ✗ Wrong: The sex of the students are mixed in this class.
- ✓ Correct: The sex of the students is mixed in this class.
- Why: The subject 'sex' is singular, so use singular verb 'is', not 'are'.
Words Confused With Sex
- Sex vs Gender: Sex is biological; gender includes social and cultural roles and identity.
Other Forms of Sex
- Noun: sex
Frequently Asked Questions About Sex
What is the meaning of "Sex"?
Whether someone or an animal is male or female; the physical difference between males and females.
How do you pronounce "Sex"?
The IPA is /sɛks/. /sɛks/ rhymes with 'decks'. The 'e' is short, like in 'best', not long like in 'see'.
What part of speech is "Sex"?
"Sex" is a noun at A2 level (Common European Framework).
What are synonyms for "Sex"?
Common synonyms include gender, biological difference, male or female.
How do you use "Sex" in a sentence?
For example: "The survey asked about sex and age."