Origin: OE. Thef, theef, AS. Eof; akin to OFries. Thiaf, OS. Theof, thiof, D. Dief, G. Dieb, OHG. Diob, Icel. Jofr, Sw. Tjuf, Dan. Tyv, Goth. Iufs, iubs, and perhaps to Lith. Tupeti to squat or crouch down. Cf. Theft.
2. A waster in the snuff of a candle. Thief catcher. Same as Thief taker. Thief leader, one who leads or takes away a thief. Thief taker, one whose business is to find and capture thieves and bring them to justice. Thief tube, a tube for withdrawing a sample of a liquid from a cask. Thieves' vinegar, a kind of aromatic vinegar for the sick room, taking its name from the story that thieves, by using it, were enabled to plunder, with impunity to health, in the great plague at london.
Synonym: robber, pilferer.
Thief, robber. A thief takes our property by stealth; a robber attacks us openly, and strips us by main force. Take heed, have open eye, for thieves do foot by night. (Shak) Some roving robber calling to his fellows. (milton)