SEX
sex, gender, sexuality
(noun) the properties that distinguish organisms on the basis of their reproductive roles; “she didn’t want to know the sex of the foetus”
sex, sexual urge
(noun) all of the feelings resulting from the urge to gratify sexual impulses; “he wanted a better sex life”; “the film contained no sex or violence”
sex
(noun) either of the two categories (male or female) into which most organisms are divided; “the war between the sexes”
sex
(verb) tell the sex (of young chickens)
arouse, sex, excite, turn on, wind up
(verb) stimulate sexually; “This movie usually arouses the male audience”
Source: WordNet® 3.1
Etymology 1
Noun
sex (countable and uncountable, plural sexes)
(countable) A category into which sexually-reproducing organisms are divided on the basis of their reproductive roles in their species.
(countable) Another category, especially of humans and especially based on sexuality or gender roles.
(countable) The members of such a category, taken collectively.
(uncountable) The distinction and relation between these categories, especially in humans; gender.
(obsolete or literary, uncountable, with "the") Women; the human female sex and those who belong to it.
(uncountable) Sexual activity, usually sexual intercourse unless preceded by a modifier.
(countable, euphemism or slang) Genitalia: a penis or vagina.
Synonyms
• (divisions of organisms by reproductive role): gender (sometimes proscribed: see usage note)
• (copulation): See also copulation
Hypernyms
• See species
Hyponyms
• (usual): See male and female
• (in some contexts): See bigender, transgender, genderless, intersex, genderfluid, homosexual, eunuch
• (jocular, now uncommon): See clergy
Verb
sex (third-person singular simple present sexes, present participle sexing, simple past and past participle sexed)
(zoology, transitive) To determine the sex of an animal.
(chiefly, US, colloquial, intransitive) To have sex with.
Synonyms
• (to have sex): do it, get it on, have sex; see also copulate
Etymology 2
Noun
sex (plural sexes)
(obsolete) Alternative form of sect.
Anagrams
• exs., sXe
Source: Wiktionary
Sex-. Etym: [L. sex six. See Six.]
Definition: A combining form meaning six; as, sexdigitism; sexennial.
Sex, n. Etym: [L. sexus: cf. F. sexe.]
1. The distinguishing peculiarity of male or female in both animals
and plants; the physical difference between male and female; the
assemblage of properties or qualities by which male is distinguished
from female.
2. One of the two divisions of organic beings formed on the
distinction of male and female.
3. (Bot.)
(a) The capability in plants of fertilizing or of being fertilized;
as, staminate and pistillate flowers are of opposite sexes.
(b) One of the groups founded on this distinction. The sex, the
female sex; women, in general.
Source: Webster’s Unabridged Dictionary 1913 Edition