pool

A "pool" can be many things! Most commonly, it's the blue water you dive into on a hot summer day, a place for splashing, swimming, and cooling off. But a pool isn't just about water. Think of a "talent pool," meaning a group of people with useful skills, or a "gene pool," meaning the full set of genes in a group of living things. Money can also be put into a pool when several people add to the same amount for a shared purpose, game, or prize.

The word comes from Old English and first referred to a deep place in a river or stream. So whether it involves water, talent, genes, or money, a pool is usually something gathered together in one place. You might draw from the pool of job candidates or pool your money with friends to pay for something together.

The word "pool" has several meanings, but many of them connect to the idea of things gathered together in one place. The most familiar meaning is a body of still water, such as a swimming pool, a small natural pool among rocks, or a quiet patch of water in a river. A sentence like "she spent the afternoon by the pool" gives the most common everyday picture of the word.

But "pool" is also used for groups, shared amounts, and combined resources. A "talent pool" is a group of people who are available and have the right skills. A "gene pool" is the full set of genes in a population. A "resource pool" is a shared supply that people or groups can use. In the same way, money can be put into a pool when several people contribute to one shared amount, such as in betting, office collections, or competition prizes. As a verb, to pool means to combine things, especially money, effort, information, or resources, so people can use them together.

The word also names the cue sport often called pool. In that game, players use cues to strike balls around a table with pockets. This meaning is common enough that many learners will meet it early, especially in everyday conversation, films, and sports settings.

There are also a few related uses. In medicine, a "pool" can mean a small amount of liquid collecting in one area. In business or work, people may speak of a labor pool or a pool of applicants. In computing or systems, a pool can mean a shared set of available items, such as workers, memory, or connections. Across these uses, the central idea stays much the same: water, people, money, or other things are collected and available in one place.