A more thorough explanation:

Definition: A thief is someone who steals things, especially without using force or violence. They commit theft or larceny.

Examples:

• A person who takes someone else's wallet without permission is a thief.
• Someone who steals a car from a parking lot is also a thief.
• A common thief is someone who has been convicted of theft or larceny more than once.
• A manifest thief is someone who is caught stealing with evidence that proves their guilt.

The examples illustrate the definition of a thief by showing different scenarios where someone takes something that doesn't belong to them. It's important to remember that stealing is illegal and can have serious consequences.