Looking for the meaning or definition of the word jack? Here's what it means.
Noun
A mechanical device used to raise and (temporarily) support a heavy object, e.g. screw jack, scissor jack, hydraulic jack, ratchet jack, scaffold jack.
A system of gearing driven by a horse power, for multiplying speed.
A hood or other device placed over a chimney or vent pipe, to prevent a back draught.
In the harpsichord, an intermediate piece communicating the action of the key to the quill; also called hopper.
In hunting, the pan or frame holding the fuel of the torch used to attract game at night; also, the light itself.
(nautical) A bar of iron athwart ships at a topgallant masthead, to support a royal mast, and give spread to the royal shrouds; also called jack crosstree.
Female ended electrical connector (see Electrical connector)
Electrical connector in a fixed position (see Gender of connectors and fasteners)
To produce by freeze distillation; to distil (an alcoholic beverage) by freezing it and removing the ice (which is water), leaving the alcohol (which remains liquid).