pit in WordNet English dictionary

1. a sizeable hole (usually in the ground)
   "they dug a pit to bury the body"
   pit  cavity 
   
2. a workplace consisting of a coal mine plus all the buildings and equipment connected with it
   colliery  pit 
   
3. the hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed
   "you should remove the stones from prunes before cooking"
   stone  pit  endocarp 
   
4. a concavity in a surface (especially an anatomical depression)
   pit  fossa 
   
5. (Christianity) the abode of Satan and the forces of evil; where sinners suffer eternal punishment
   "Hurl'd headlong...To bottomless perdition, there to dwell"- John Milton; "a demon from the depths of the pit"; "Hell is paved with good intentions"-Dr. Johnson
   Hell  perdition  Inferno  infernal region  nether region  pit 
   
6. lowered area in front of a stage where an orchestra accompanies the performers
   orchestra pit  pit 
   
7. a surface excavation for extracting stone or slate
   "a British term for `quarry' is `stone pit'"
   pit  quarry  stone pit 
   
8. a trap in the form of a concealed hole
   pit  pitfall 
   
9. (auto racing) an area at the side of a racetrack where the race cars are serviced and refueled
   pit 
   
10. (commodity exchange) the part of the floor of a commodity exchange where trading in a particular commodity is carried on
    pit 
    
11. an enclosure in which animals are made to fight
    pit 
    

1. mark with a scar
   "The skin disease scarred his face permanently"
   scar  mark  pock  pit 
   
2. set into opposition or rivalry
   "let them match their best athletes against ours"; "pit a chess player against the Russian champion"; "He plays his two children off against each other"
   pit  oppose  match  play off 
   
3. remove the pits from
   "pit plums and cherries"
   pit  stone