To raise, hoist, or lift a thing using a jack, or similar means. / (informal) To raise, increase, or accelerate; often said of prices, fees, or rates.

A jack on a wall used to connect a telephone to the telephone line.

A jack on a wall used to connect a television to the cable television service.

Hoisted, lifted off the ground, or propped up using a jack. / (slang, automotive) Describes a 4x4 automobile that has a "lift kit", raising the body and/or frame higher than stock.

simple past tense and past participle of jack up

Alternative form of jack-o'-lantern

Alternative form of jumping jack

simple past tense and past participle of jack-knife

plural of jack-knife

Third-person singular simple present indicative form of jack-knife