the GNU version of the Collaborative International Dictionary of English
n. One who tortures; a tormentor.
The Century Dictionary and Cyclopedia
n. One who tortures, in any sense; especially, one who executed or superintended the execution of torture ordered by a tribunal.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. someone who inflicts severe physical pain (usually for punishment or coercion)
Word Usage
"Looking at 18 USC 2340 (1) and (2) (d), and noting that under 18 USC 2340A, if death results in the course of torture, that the torturer is subject to the death penalty."