| JACKSCREW | • jackscrew n. A jack (mechanical lifting device) which is operated by turning a leadscrew. • jackscrew n. A leadscrew; a screw used to translate rotational into linear motion. • jack␣screw n. Alternative form of jackscrew. |
| JAYHAWKER | • jayhawker n. (Historical) An abolitionist raider in the Kansas–Missouri border skirmishes during the American Civil War. • jayhawker n. Any robber or bandit. • JAYHAWKER n. a name given to a freebooting, un-enlisted, armed man or guerrilla in the American Civil War. |
| JAYWALKER | • jaywalker n. A person who violates pedestrian traffic regulations by crossing a street away from a designated crossing… • jay-walker n. Alternative spelling of jaywalker. • JAYWALKER n. one who walks in the road rather than on the pavement. |
| JERKWATER | • jerkwater n. (US, historical) A train on a branch line. • jerkwater n. A jerkwater town. • jerkwater adj. (US, colloquial, derogatory) Of an inhabited place, small, insignificant, and backward. |
| JABBERWOCK | • Jabberwock prop.n. A fantastical dreaded monster with flaming eyes. • JABBERWOCK n. nonsense, gibberish, also JABBERWOCKY. |
| JACKSCREWS | • jackscrews n. Plural of jackscrew. • jack␣screws n. Plural of jack screw. • JACKSCREW n. a jack in which a screw is used for lifting, or exerting pressure. |
| JAWBREAKER | • jawbreaker n. A large, extremely hard, boiled candy, typically spherical. • jawbreaker n. A long, hard-to-pronounce word. • jawbreaker n. (Boxing, slang) A hard blow to the side of the face. |
| JAYHAWKERS | • jayhawkers n. Plural of jayhawker. • JAYHAWKER n. a name given to a freebooting, un-enlisted, armed man or guerrilla in the American Civil War. |
| JAYWALKERS | • jaywalkers n. Plural of jaywalker. • jay-walkers n. Plural of jay-walker (alternative spelling of jaywalkers). • JAYWALKER n. one who walks in the road rather than on the pavement. |
| JERKWATERS | • jerkwaters n. Plural of jerkwater. • jerk-waters n. Plural of jerk-water. • JERKWATER n. a train on a branch line. |
| JABBERWOCKS | • JABBERWOCK n. nonsense, gibberish, also JABBERWOCKY. |
| JABBERWOCKY | • jabberwocky n. Invented or meaningless language; nonsense. • jabberwocky adj. Meaningless, worthless. • jabberwocky adj. Absurd, nonsense, nonsensical. |
| JAWBREAKERS | • jawbreakers n. Plural of jawbreaker. • jaw-breakers n. Plural of jaw-breaker (alternative form of jawbreakers). • JAWBREAKER n. a word hard to pronounce. |
| JAWBREAKING | • jawbreaking adj. Very difficult to pronounce. • JAWBREAKING adj. difficult to pronounce. |
| JOURNEYWORK | • journeywork n. (Obsolete) Work done by the day. • journeywork n. Work done by a journeyman at his trade. • JOURNEYWORK n. work done by a journeyman. |
| JOURNEYWORKS | • JOURNEYWORK n. work done by a journeyman. |
| JABBERWOCKIES | • jabberwockies n. Plural of jabberwocky. • JABBERWOCKY n. nonsense, gibberish, also JABBERWOCK. |
| JAWBREAKINGLY | • jawbreakingly adv. In a way that is very difficult to say or pronounce. • JAWBREAKING adv. difficult to pronounce. |