Definition of "sex"
sex1
noun
countable and uncountable, plural sexes
(countable) Another category, especially of humans and especially based on sexuality or gender roles.
Quotations
Still there are some loop-holes out of which a man may creep, and dare to think and act for himself; but for a woman it is an herculean task, because she has difficulties peculiar to her sex to overcome, which require almost super-human powers.
1791 (date written), Mary Wollstonecraft, A Vindication of the Rights of Woman: With Strictures on Political and Moral Subjects, 1st American edition, Boston, Mass.: […] Peter Edes for Thomas and Andrews, […], published 1792
(obsolete or literary, uncountable, with "the") Women; the human female gender and those who belong to it.
Quotations
The sex of Venice are undoubtedly of a distinguished beauty.
1789 November 3, Arthur Young, Travels... undertaken with a view of ascertaining the cultivation... of the kingdom of France, i, 220
Even the reptile temperament of Noel Vanstone warmed under the influence of the sex: he had an undeniably appreciative eye for a handsome woman, and Magdalen's grace and beauty were not thrown away on him.
1862, [William] Wilkie Collins, chapter IV, in No Name. […], volume II, London: Sampson Low, Son, & Co., […], 4th (Aldborough, Suffolk), page 195
verb
third-person singular simple present sexes, present participle sexing, simple past and past participle sexed
(chiefly US, colloquial, transitive) To have sex with.
Quotations
The neighbor guy, I just came to understand, is sexing the lady across the street from him. He's got a girlfriend. She is married. While I don't think that is particularly cool, I also don't think it is any of my business either.
2019, Michael Jean Nystrom-Schut, Foundations of Philosophy: The Basics of the Balance (Volume Iil), AuthorHouse
sex2
noun
plural sexes
(obsolete) Alternative form of sect.