any of various games played on a pool table having 6 pockets
an excavation that is (usually) filled with water
an organization of people or resources that can be shared; "a car pool"; "a secretarial pool"; "when he was first hired he was assigned to the pool"
something resembling a pool of liquid; "he stood in a pool of light"; "his chair sat in a puddle of books and magazines"
a small body of standing water (rainwater) or other liquid; "there were puddles of muddy water in the road after the rain"; "the body lay in a pool of blood"
the combined stakes of the betters
any communal combination of funds; "everyone contributed to the pool"
an unstable construction with playing cards; "he built three levels of his cardcastle before it collapsed"
a speculative scheme that depends on unstable factors that the planner cannot control; "his proposal was nothing but a house of cards"; "a real estate bubble"
an intricate knot tied by Gordius, the king of Phrygia, and cut by the sword of Alexander the Great after he heard that whoever undid it would become ruler of Asia
any very difficult problem; insoluble in its own terms
an ancient musical horn made from the horn of a ram; used in ancient times by the Israelites to sound a warning or a summons; used in synagogues today on solemn occasions