1. • noun - the formation of small pits in a surface as a consequence of corrosion
   • noun - a sizeable hole (usually in the ground)
   • noun - a concavity in a surface (especially an anatomical depression)
   • noun - the hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed
   • noun - (Christianity) the abode of Satan and the forces of evil
   • noun - an enclosure in which animals are made to fight
   • noun - (commodity exchange) the part of the floor of a commodity exchange where trading in a particular commodity is carried on
   • noun - (auto racing) an area at the side of a racetrack where the race cars are serviced and refueled
   • noun - a trap in the form of a concealed hole
   • noun - a surface excavation for extracting stone or slate
   • noun - lowered area in front of a stage where an orchestra accompanies the performers
   • noun - a workplace consisting of a coal mine plus all the buildings and equipment connected with it
2. • n - an arrangement of cavities or depressions

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