3. (noun)stone, pit, endocarp 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"
4. (noun)Hell, perdition, Inferno, infernal region, nether region, pit (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
5. (noun)pit an enclosure in which animals are made to fight
12. (verb)pit, oppose, match, play off 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"
13. (verb)scar, mark, pock, pit mark with a scar "The skin disease scarred his face permanently"
14. (verb)pit, stone remove the pits from "pit plums and cherries"
10. (noun)pit the indentation or mark left by a pustule, as in smallpox
11. (noun)pit formerly, that part of a theater, on the floor of the house, below the level of the stage and behind the orchestra; now, in England, commonly the part behind the stalls; in the United States, the parquet; also, the occupants of such a part of a theater
12. (noun)pit an inclosed area into which gamecocks, dogs, and other animals are brought to fight, or where dogs are trained to kill rats
13. (noun)pit the endocarp of a drupe, and its contained seed or seeds; a stone; as, a peach pit; a cherry pit, etc
14. (noun)pit a depression or thin spot in the wall of a duct
15. (verb)pit to place or put into a pit or hole
16. (verb)pit to mark with little hollows, as by various pustules; as, a face pitted by smallpox
17. (verb)pit to introduce as an antagonist; to set forward for or in a contest; as, to pit one dog against another