third in WordNet English dictionary

1. coming next after the second and just before the fourth in position
   third  3rd  tertiary 
   

1. one of three equal parts of a divisible whole
   "it contains approximately a third of the minimum daily requirement"
   one-third  third  tierce 
   
2. 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)
   "he is playing third"
   third base  third 
   
3. the third from the lowest forward ratio gear in the gear box of a motor vehicle
   "you shouldn't try to start in third gear"
   third gear  third 
   
4. the base that must be touched third by a base runner in baseball
   "he was cut down on a close play at third"
   third base  third 
   
5. the musical interval between one note and another three notes away from it
   "a simple harmony written in major thirds"
   third 
   
6. following 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"
   third 
   

1. in the third place
   "third we must consider unemployment"
   third  thirdly  third  thirdly