Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary
1

sex

play
noun \ˈseks\

Simple Definition of sex

  • : the state of being male or female

  • : men or male animals as a group or women or female animals as a group

  • : physical activity in which people touch each other's bodies, kiss each other, etc. : physical activity that is related to and often includes sexual intercourse

Source: Merriam-Webster's Learner's Dictionary

Full Definition of sex

  1. 1 :  either of the two major forms of individuals that occur in many species and that are distinguished respectively as female or male especially on the basis of their reproductive organs and structures

  2. 2 :  the sum of the structural, functional, and behavioral characteristics of organisms that are involved in reproduction marked by the union of gametes and that distinguish males and females

  3. 3a :  sexually motivated phenomena or behaviorb :  sexual intercourse

  4. 4 :  genitalia

Examples of sex in a sentence

  1. The form asks for your name, age, and sex.

  2. The couple didn't know what the sex of their baby would be.

  3. How do you tell the sex of a hamster?

  4. discrimination on the basis of sex

  5. Some feel men are the more aggressive sex.

  6. All he ever thinks about is sex.

  7. Her mom talked to her about sex.

  8. She doesn't like all the sex and violence in movies.

  9. He had sex with his girlfriend.



Origin of sex

Middle English, from Latin sexus


First Known Use: 14th century

Rhymes with sex

dex, ex, flex, hex, lex, rex, specs, vex, x


2

sex

transitive verb

Definition of sex

  1. 1 :  to identify the sex of <sex newborn chicks>

  2. 2a :  to increase the sexual appeal of —often used with upb :  to arouse the sexual desires of



1884

First Known Use of sex

1884



SEX Defined for Kids

sex

play
noun \ˈseks\

Definition of sex for Students

  1. 1 :  either of two divisions into which many living things can be divided according to their roles in reproduction and which consist of males or females

  2. 2 :  the state of being male or female <The form asks for your name, age, and sex.>

  3. 3 :  sexual activity




Medical Dictionary

1

sex

play
noun \ˈseks\

Medical Definition of sex

  1. 1:  either of the two major forms of individuals that occur in many species and that are distinguished respectively as male or female

  2. 2:  the sum of the structural, functional, and behavioral characteristics of living things that are involved in reproduction by two interacting parents and that distinguish males and females

  3. 3a:  sexually motivated phenomena or behaviorb:  sexual intercourse




2

sex

transitive verb

Medical Definition of sex

  1. :  to identify the sex of <techniques for sexing human embryos>




Learn More about sex


Seen and Heard

What made you want to look up sex? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

tending to dismiss important matters

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alt-5746713d76276

Which of these is a synonym of nonplus?

reduce disapprove soothe perplex
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ