n. A hose-coupling wrench or spanner. The hose-coupling union may have pins or tits on its exterior face, fitting a hole in the end of the curved bar or spanner; or the unions may have radial holes into which a tit on the end of the spanner may enter.n. A crooked or tortuous action; a fraudulent device; a trick; a deceit; a stratagem.n. A violent twist or turn given to something; a pulling awry: a sudden twisting out of shape, place, or relation: used of both material and immaterial things: as, to sprain one's foot by a wrench; the change was a great wrench to his feelings.n. A sharp turn; specifically, in coursing, the turning of a hare at less than a right angle.n. In mathematical physics, a force, or variation of force, tending to give a body a twist about an imaginary or real screw.n. A tool consisting essentially of a bar of metal having jaws at one end adapted to catch upon the head of a bolt or a nut, or to hold a metal pipe or rod, so as to turn it.n. Means of compulsion.To twist or turn about with effort or violence; give a sudden twist to; hence, to distort; pervert; turn awry.To injure or pain by a twisting action; produce a distorting effect in or upon; distort; sprain: as, to wrench one's ankle.To pull or draw with torsion; extract by twisting or tortuous action; hence, to wrest forcibly or violently.To have or undergo a wrenching motion; turn twistingly.