A more thorough explanation:

Definition: A pound can refer to:

1. A place where impounded property is held until redeemed.
2. A place for the detention of stray animals.
3. A measure of weight equal to 16 avoirdupois ounces or 7,000 grains.
4. The basic monetary unit of the United Kingdom, equal to 100 pence.

Examples:

• If your car is towed, it may be taken to the pound until you pay to get it back.
• If a dog is found wandering the streets without an owner, it may be taken to the pound until the owner is found.
• A pound of flour weighs 16 ounces.
• In the UK, you can buy a candy bar for one pound.

The examples illustrate the different meanings of the word "pound." The first two examples refer to a place where things or animals are held. The third example shows how a pound can be used as a unit of weight. The fourth example shows how a pound can be used as a unit of currency in the UK.