A thief is someone or something that performs theft, a crime against property. The word is used in related senses, such as:

• Thief, a computer game
• Thief, an arcade game
• Thief, a 1981 film
• Thief, a common role-playing game character class
• Thief, an interface program for Internet Chess Servers

See also:

• thief knot, a type of knot
• The Thief of Bagdad, the title of films in both 1924 and 1940
• To Catch a Thief, a 1955 film
• Hail to the Thief, an album by Radiohead
• The Tale of the Body Thief, a novel by Anne Rice
• The Bicycle Thief, a 1948 film