Third

Third or 3rd may refer to:

Numbers

 * 3rd, the ordinal form of the cardinal number 3
 * $1/undefined$, a fraction of one third
 * 1⁄60 of a second, i.e., the third in a series of fractional parts in a sexagesimal number system

Places

 * 3rd Street (disambiguation)
 * Third Avenue (disambiguation)
 * Highway 3

Music theory

 * Interval number of three in a musical interval
 * major third, a third spanning four semitones
 * minor third, a third encompassing three half steps, or semitones
 * neutral third, wider than a minor third but narrower than a major third
 * augmented third, an interval of five semitones
 * diminished third, produced by narrowing a minor third by a chromatic semitone
 * Third (chord), chord member a third above the root
 * Degree (music), three away from tonic
 * mediant, third degree of the diatonic scale
 * submediant, sixth degree of the diatonic scale – three steps below the tonic
 * chromatic mediant, chromatic relationship by thirds
 * Ladder of thirds, similar to the circle of fifths

Albums

 * Third/Sister Lovers, a 1974 album by Big Star first released in 1978
 * Third (Soft Machine album), 1970
 * Third (Portishead album), 2008
 * Third (Cait Brennan album), a 2017 album by Cait Brennan
 * 3rd (The Rasmus EP), 1996
 * 3rd (The Baseball Project album), released by The Baseball Project in 2014
 * Thirds (album), a 1971 album by the James Gang

Other uses

 * Third (play), a 2005 work by Wendy Wasserstein
 * Third (curling), a curling position
 * Thirds, third-born children in the 1985 novel Ender's Game
 * Thirds, a 2007 play by Jacob M. Appel
 * Third World, economically underdeveloped nations
 * Third-class degree, a type of British undergraduate degree classification
 * Third (angle), in astronomy and cartography, fraction of a degree
 * Richard Third (1927–2016), Anglican bishop in the Church of England
 * Third Beach, located at Ferguson Point in Stanley Park in Vancouver, British Columbia
 * Third Brook, flows into West Brook by Walton, New York