Wordnet 3.0
NOUN (2)
1. 
 (golf) the cavity left when a piece of turf is cut from the ground by the club head in making a stroke; 
- Example: "it was a good drive but the ball ended up in a divot"2. 
 a piece of turf dug out of a lawn or fairway (by an animals hooves or a golf club); 
The Collaborative International Dictionary of English v.0.48:
Divot \Div"ot\, n.
   1. A thin, oblong turf used for covering cottages, and also
      for fuel. [Scot.] --Simmonds.
      [1913 Webster]
   2. (Golf) a small piece of turf gouged out of the ground by
      the head of a golf club when making a stroke; as, all
      divots should be replaced.
      [PJC]
WordNet (r) 3.0 (2006):
divot
    n 1: (golf) the cavity left when a piece of turf is cut from the
         ground by the club head in making a stroke; "it was a good
         drive but the ball ended up in a divot"
    2: a piece of turf dug out of a lawn or fairway (by an animals
       hooves or a golf club)