a person who steals, especially secretly or without open force; one guilty of theft or larceny.
Origin: before 900; Middle English; Old English thēof; cognate with Dutch dief,German Dieb,Old Norse thjōfr,Gothic thiufs
Related forms
un·der·thief, noun, plural -thieves.
Can be confused:burglar, mugger, robber, thief (see synonym note at the current entry).
Synonyms burglar, pickpocket, highwayman. Thief,robber refer to one who steals. A thief takes the goods or property of another by stealth without the latter's knowledge: like a thief in the night. A robber trespasses upon the house, property, or person of another, and makes away with things of value, even at the cost of violence: A robber held up two women on the street.