Antonym: jenny. Similar words: jacket, lumberjack, jack of all trades, backpack, adjacent, ejaculate, ACK, sack. Meaning: [dʒæk] 
n. 1. a small worthless amount 2. a man who serves as a sailor 3. someone who works with their hands; someone engaged in manual labor 4. immense East Indian fruit resembling breadfruit; it contains an edible pulp and nutritious seeds that are commonly roasted 5. a small ball at which players aim in lawn bowling 6. an electrical device consisting of a connector socket designed for the insertion of a plug 7. game equipment consisting of one of several small six-pointed metal pieces that are picked up while bouncing a ball in the game of jacks 8. small flag indicating a ship's nationality 9. one of four face cards in a deck bearing a picture of a young prince 10. tool for exerting pressure or lifting 11. any of several fast-swimming predacious fishes of tropical to warm temperate seas 12. male donkey. v. 1. lift with a special device 2. hunt with a jacklight.
n. 1. a small worthless amount 2. a man who serves as a sailor 3. someone who works with their hands; someone engaged in manual labor 4. immense East Indian fruit resembling breadfruit; it contains an edible pulp and nutritious seeds that are commonly roasted 5. a small ball at which players aim in lawn bowling 6. an electrical device consisting of a connector socket designed for the insertion of a plug 7. game equipment consisting of one of several small six-pointed metal pieces that are picked up while bouncing a ball in the game of jacks 8. small flag indicating a ship's nationality 9. one of four face cards in a deck bearing a picture of a young prince 10. tool for exerting pressure or lifting 11. any of several fast-swimming predacious fishes of tropical to warm temperate seas 12. male donkey. v. 1. lift with a special device 2. hunt with a jacklight. 
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(121) Jack doubles as director and producer.
(122) Jack is Mary's boyfriend -- Mary is Jack's girlfriend.
(123) He agreed to our sending Jack to Hong Kong.
(124) Jack collapsed in agony on the floor.
(124) Sentencedict.com is a sentence dictionary, on which you can find excellent sentences for a large number of words.
(125) Jack has been dabbling at painting this summer vacation.
(126) Jack had allowed himself to become fat.
(127) Jack is enamoured with scientific researches.
(128) I don't blame Jack for the mistake.
(129) Jack has a singleton in hearts.
(130) Jack is a full back of the team.
(131) Mary bragged that she could run faster than Jack.
(132) Jack was on for three more overs.
(133) Jack caught a glimpse of her panic-stricken face.
(134) The meeting with Jack was fortuitous.
(135) Jack went on vacation to contemplate his future.
(136) The boss took off on Jack.
(137) Jack seems bent on becoming a doctor.
(138) Did Jack bed with Mary before they were married?
(139) Jack is very much attached to the little boy.
(140) Jack elbowed his way through the crowd.
(141) The film has a great performance from Jack Lemmon.
(142) Jack rubbed the mud off his face.
(143) Spies, every man jack of them, I'd bet.
(144) They applauded Jack for his courage.
(145) Jack danced Marry around the ballroom.
(146) Jack has been enthusing over the newcome girl recently.
(147) Jack got into computer when he was only thirteen.
(148) Do you know about Jack getting arrested?
(149) I've been trying to raise Jack/Tokyo all day.
(150) Jack bunched his girlfriend a bunch of flowers.