sex
n. · v.-
1 sexual activity (n.) B1 Intermediatephysical activity between people that is related to sexual pleasure.
sexual activity, specifically sexual intercourse or other intimate physical acts.
ExampleThe book discusses how to have a healthy conversation about sex with your partner.
ExampleThe study examines the correlation between physical exercise and a healthy interest in sex among middle-aged adults.
Usageuncountable in this sense.
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2 people of one category (n.) B2 Upper Intermediateall the people of one biological group, such as all women or all men.
the members of a particular biological sex considered collectively.
ExampleThe club was open to members of either sex.
ExampleThe legislation was designed to prevent discrimination against either sex in the workplace.
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3 to identify biological sex (v.) C1 Advanced Technical Scienceto find out if an animal is male or female.
to determine the biological sex of an organism, typically an animal or a plant.
ExampleIt can be quite difficult to sex some species of birds just by looking at them.
ExampleThe researchers had to sex the hatchlings immediately to ensure an accurate count of the male-to-female ratio in the population.
Usagetransitive verb.