Jack

1. v. t. To move or lift, as a house, by means of a jack or jacks. See 2d Jack, n., 5.
2. n. A large tree, the Artocarpus integrifolia, common in the East Indies, closely allied to the breadfruit, from which it differs in having its leaves entire. The fruit is of great size, weighing from thirty to forty pounds, and through its soft fibrous matter are scattered the seeds, which are roasted and eaten. The wood is of a yellow color, fine grain, and rather heavy, and is much used in cabinetwork. It is also used for dyeing a brilliant yellow.
3. n. A familiar nickname of, or substitute for, John.
4. n. An impertinent or silly fellow; a simpleton; a boor; a clown; also, a servant; a rustic.
5. n. A popular colloquial name for a sailor; — called also Jack tar, and Jack afloat.
6. n. A mechanical contrivance, an auxiliary machine, or a subordinate part of a machine, rendering convenient service, and often supplying the place of a boy or attendant who was commonly called Jack
7. n. A device to pull off boots.
8. n. A sawhorse or sawbuck.
9. n. A machine or contrivance for turning a spit; a smoke jack, or kitchen jack.
10. n. A wooden wedge for separating rocks rent by blasting.
11. 1v. t. 1 To move or lift, as a house, by means of a jack or jacks. See 2d Jack, n., 5.
12. 1n. 1 A large tree, the Artocarpus integrifolia, common in the East Indies, closely allied to the breadfruit, from which it differs in having its leaves entire. The fruit is of great size, weighing from thirty to forty pounds, and through its soft fibrous matter are scattered the seeds, which are roasted and eaten. The wood is of a yellow color, fine grain, and rather heavy, and is much used in cabinetwork. It is also used for dyeing a brilliant yellow.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.