Ellipsis of French Third Republic. Synonym of France (“1870-1940”) (from then end of the Second Empire to the capitulation to by Nazi Germany)

A third gender, a category of people who are not male or female, or whose sexual roles, anatomy, or identities place them outside of the established male and female categories.

plural of third sex

Rare form of two-thirds.

(transitive, intransitive) To act as a third wheel; to accompany two people on a date.

present participle of third-party

simple past tense and past participle of third-party

Third-person singular simple present indicative form of third-party

(finance) The trading of exchange-listed securities over the counter rather than through the exchange.

(politics) The conversion of a nation into a Third-World nation.