Open English Wordnet
Nouns
(n)one-third, third, tierceone of three equal parts of a divisible whole“it contains approximately a third of the minimum daily requirement” (n)third base, thirdthe 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)“he is playing third” (n)thirdfollowing the second position in an ordering or series“a distant third”,
“he answered the first question willingly, the second reluctantly, and the third with resentment” (n)thirdthe musical interval between one note and another three notes away from it“a simple harmony written in major thirds” (n)third gear, thirdthe third from the lowest forward ratio gear in the gear box of a motor vehicle“you shouldn't try to start in third gear” (n)third base, thirdthe base that must be touched third by a base runner in baseball“he was cut down on a close play at third” Adjectives
(s)third, 3rd, tertiarycoming next after the second and just before the fourth in position Adverbs
(r)third, thirdlyin the third place“third we must consider unemployment”