Third world

Third gender

Third-class degree, in the British higher education system

Third/Sister Lovers, by Big Star

Third (album), by Soft Machine

Mediant, the third degree of the diatonic scale

Third (play), by Wendy Wasserstein

Ladder of thirds

Third is the ordinal number corresponding to 3 (number) and also the fraction <math>\frac {1} {3}</math>. It may also refer to:

Major third or Minor third