Third

For the musical definitions of third, see the following intervals:

• Major third
• Minor third

The mediant, and the chord built on the mediant, is often called simply the third, as it is the third degree of the diatonic scale. See also Ladder of thirds.

'Third' is also the ordinal number corresponding to three, as well as the fraction 1/3.

For a definition, follow this link:

• wiktionary:third