Definition of "Pool" :

noun: any of various games played on a pool table having 6 pockets

noun: an excavation that is (usually) filled with water

noun: an association of companies for some definite purpose

noun: an organization of people or resources that can be shared

"A car pool."

noun: something resembling a pool of liquid

"He stood in a pool of light."

noun: a small lake

noun: a small body of standing water (rainwater) or other liquid

"The body lay in a pool of blood."

noun: the combined stakes of the betters

noun: any communal combination of funds

"Everyone contributed to the pool."

verb: join or form a pool of people

verb: combine into a common fund

"We pooled resources."