An approach or solution which strives for an alternative to or middle ground between two opposing viewpoints.

Alternative spelling of third-world

(music) a major third in the final tonic chord of a minor-key passage, a device mostly used in Baroque, although occasionally in Classical music, and then adopted much later on in neoclassicism.

(idiomatic) A person or thing that serves no useful purpose. / (idiomatic) An unwanted third party accompanying two people on a date.

(US, education) The period in school that comes after second grade and before fourth grade.

Of or relating to a third party.

(video games) To intervene in a fight between two players or teams, often allowing one to easy defeat both (sometimes seen as unfair).

(law) The least severe level of felony, typically involving a lack of planning and/or the presence of various mitigating factors.

(baseball) The base after second base in a counter-clockwise path around a baseball infield. / (blackjack) The betting spot located immediately to the right of the dealer, which is last to act.

(cricket) the session of a day's play between tea and close of play