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noun British English pronunciation: sex /seks/ 
Word Forms
  1. 1
    [uncountable] the activity in which people kiss and touch each other's sexual organs, which may also include sexual intercourse

    Please don't talk about sex in front of the children.

    the impact of sex and violence in TV programmes

    have sex:

    Parents worry about their teenagers having sex.

    1. a.
      [only before noun] relating to or involving sexual activity

      a sex partner (=someone who you have sex with)

      a sex scandal involving the President

  2. 2
    [countable] males or females considered as separate groups

    equal treatment of the sexes

    The hostel has separate sleeping areas for each sex.

    1. a.
      [countable/uncountable] the group of features or qualities that make a person, animal, or plant either male or female

      Discrimination against someone based on their sex is illegal.

      We don't want to know the sex of our baby before it is born.

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