Alternative spelling of third-world

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

The person or thing in the twenty-third position. / One of twenty-three equal parts of a whole.

The ordinal form of the number twenty-three.

Of or from the Third World.

(historical, politics) Those countries not aligned with the west or the east during the Cold War. / (sometimes derogatory) The developing countries of Asia, Africa and Latin America.

(linguistics, with "the") The words, word-forms, and grammatical structures, taken collectively, that are normally used of people or things other than the speaker or the audience.

The third gear of an engine.

A musical interval with exactly three half steps that spans two degrees of diatonic scale.

(music) A musical interval of the Western twelve-semitone system consisting of four semitones and spanning three degrees of the diatonic scale. Major scales are so named because of the major third interval between the tonic and mediant of a major tonic triad. It is enharmonically equivalent to a diminished fourth.