Alternative spelling of blackjack / Caranx lugubris, a gamefish / Bidens spp., from the family of Asteraceae / (obsolete) The larva of a turnip sawfly (Athalia rosae) / (mining, mineralogy) Sphalerite.

Alternative form of jack-o'-lantern

A breed of terrier dog, usually white with brown patches and commonly found domesticated and kept as pets.

(poker slang) A three and a nine as a starting hand in Texas hold 'em.

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.

plural of Cracker Jack

Alternative form of jumping jack

A compact folding knife. / The front-dive pike, in which the body folds and unfolds. / (colloquial) A semi-trailer truck accident in which the vehicle mimics the closing of a jack-knife.