n one of three equal parts of a divisible whole
n the fielding position of the player on a baseball team who is stationed near the third of the bases in the infield (counting counterclockwise from home plate)
n following the second position in an ordering or series
n the musical interval between one note and another three notes away from it
n the third from the lowest forward ratio gear in the gear box of a motor vehicle
n the base that must be touched third by a base runner in baseball
n. [法]归寡妇所得的亡夫遗产的三分之一；[商]（商品的）三等品