a sizeable hole (usually in the ground)

a surface excavation for extracting stone or slate

a workplace consisting of a coal mine plus all the buildings and equipment connected with it

a trap in the form of a concealed hole

lowered area in front of a stage where an orchestra accompanies the performers

(auto racing) an area at the side of a racetrack where the race cars are serviced and refueled

(commodity exchange) the part of the floor of a commodity exchange where trading in a particular commodity is carried on

an enclosure in which animals are made to fight

a concavity in a surface (especially an anatomical depression)

a designated area within a casino or other gambling establishment where various table games, such as blackjack, craps, and roulette, are located

free of ice and open to travel

to create a competition or rivalry by setting two or more things or people against each other