Wiktionary:

jack | jacks [plural] | jacked [past tense] | jacking [present participle] | knave | jackass | jackscrew | jackscrews [plural] | jackstone | jackstones [plural] | bicolor jack | blackfin jack | bootjack | cheap-jack | cottonmouth jack | Crevalle jack | green jack | horse-eye jack | jackanapes | jack-o'-lantern | jack of all trades | jack over | jack plug | jack rabbit | one-eyed jack | Senegal jack | whitetongue jack | Union Jack | yellowfin jack | jack up | jack off | jack in | jack it in

Summary:

A mechanical device used to raise and (temporarily) support a heavy object. | A man or men in general. | A male animal. | [card games] The card ranking between the ten and queen of any suit, picturing a knave or prince on its face. In some card games ...  (46 of 544 words, 25 senses, 1 image, 1 etymology, pronunciation)

Link:

http://en.wiktionary.org/wiki/jack  [cite]

Wikipedia:

Jacklight

Summary:

a 1984 poetry collection by Louise Erdrich. The collection grew from poems Erdrich wrote for her 1979 Master of Arts thesis at Johns Hopkins University. Jacklight "Jacklight" | Runaways "A Love Medicine" | "Family Reunion" | "Indian Boarding School: ...  (36 of 282 words)

Link:

http://en.wikipedia.org/wiki/Jacklight  [cite]

Columbia:

jack

Summary:

mechanical device used to multiply a relatively small applied force so that it can lift and support heavy loads, or sometimes, move massive objects ...  (24 of 135 words)

Link:

http://www.infoplease.com/ce6/sci/A0825793.html  [cite]

Encarta:

jacklight | jacklights [plural] | jacklit [past tense] | jacklighted [past tense] | jacklighting [present participle]

Summary:

a light used for fishing or hunting at night, usually illegally | to hunt or fish at night using a jacklight  (20 of 69 words, 2 senses, 1 etymology, pronunciation)

Link:

http://encarta.msn.com/dictionary 1861622807/definition.html  [cite]

Random House:

jacklight | jacklighted [past tense] | jacklit [past tense] | jacklighting [present participle]

Summary:

a portable cresset, oil-burning lantern, or electric light used as a lure in hunting or fishing at night. | to hunt or fish for with a jacklight. | to ...  (27 of 50 words, 3 senses, pronunciation)

Link:

http://dictionary.infoplease.com/jacklight  [cite]

Merriam-Webster:

jacklight

Summary:

a light used especially in hunting or fishing at night  (10 of 20 words, pronunciation)

Link:

http://www.merriam-webster.com/dictionary/jacklight  [cite]