Antonym: fore, forth, front. Similar words: back up, back on, back of, cut back, back away, hold back, set back, pay back. Meaning: [bæk] 
n. 1. the posterior part of a human (or animal) body from the neck to the end of the spine 2. the side that goes last or is not normally seen 3. the part of something that is furthest from the normal viewer 4. (football) a person who plays in the backfield 5. the series of vertebrae forming the axis of the skeleton and protecting the spinal cord 6. the protective covering on the front, back, and spine of a book 7. the part of a garment that covers the back of your body 8. a support that you can lean against while sitting 9. the position of a player on a football team who is stationed behind the line of scrimmage. v. 1. be behind; approve of 2. travel backward 3. give support or one's approval to 4. cause to travel backward 5. support financial backing for 6. be in back of 7. place a bet on 8. shift to a counterclockwise direction 9. establish as valid or genuine 10. strengthen by providing with a back or backing. adj. 1. related to or located at the back 2. located at or near the back of an animal 3. of an earlier date. adv. 1. in or to or toward a former location 2. at or to or toward the back or rear 3. in or to or toward an original condition 4. in or to or toward a past time 5. in answer 6. in repayment or retaliation.
n. 1. the posterior part of a human (or animal) body from the neck to the end of the spine 2. the side that goes last or is not normally seen 3. the part of something that is furthest from the normal viewer 4. (football) a person who plays in the backfield 5. the series of vertebrae forming the axis of the skeleton and protecting the spinal cord 6. the protective covering on the front, back, and spine of a book 7. the part of a garment that covers the back of your body 8. a support that you can lean against while sitting 9. the position of a player on a football team who is stationed behind the line of scrimmage. v. 1. be behind; approve of 2. travel backward 3. give support or one's approval to 4. cause to travel backward 5. support financial backing for 6. be in back of 7. place a bet on 8. shift to a counterclockwise direction 9. establish as valid or genuine 10. strengthen by providing with a back or backing. adj. 1. related to or located at the back 2. located at or near the back of an animal 3. of an earlier date. adv. 1. in or to or toward a former location 2. at or to or toward the back or rear 3. in or to or toward an original condition 4. in or to or toward a past time 5. in answer 6. in repayment or retaliation. 
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(91) He could trace his ancestors back seven hundred years.
(92) Slacken your legs and slowly lie back.
(93) That piece of music really took me back .
(94) Unless I'm mistaken, she was back at work yesterday.
(95) Lie back and luxuriate in the scented oil.
(96) Those who turn back never reach the summit.
(97) His thoughts wandered back to his childhood.
(98) He turned his attention back to the road again.
(99) It's too late to back down now.
(100) The police turned back the demonstrators.
(101) He wrenched his back in wrestling.
(102) I leaned back in my chair.
(103) He's off work with a bad back.
(104) I'll come back to haunt you!
(105) I dropped the receiver back in the cradle.
(106) 'You go back to bed now,' he said gently.
(107) Put the top back on the bottle.
(108) I wait for you to come back.
(109) She had a desperate longing to go back.
(110) The sea reflected back the bright sunlight.
(111) She jumped back with a little yelp of surprise.
(111) Sentencedict.com is a sentence dictionary, on which you can find nice sentences for a large number of words.
(112) Exercise will give you a sharpening figure back.
(113) I felt the familiar ache in my lower back.
(114) Exfoliate your back at least once a week.
(115) Hang on! I'll be back in two shakes!
(116) I'll call back at a more convenient time.
(117) I tried to pump up my back tyre.
(118) Hang on!I'll be back in a couple of shakes!
(119) I'll be back in a moment.
(120) Hang my coat back, I'm not going now.
More similar words: back up, back on, back of, cut back, back away, hold back, set back, pay back, call back, keep back, go back to, draw back, look back, give back, go back on, backyard, feedback, bring back, fall back on, background, double back, back and forth, date back to, quarterback, tobacco, bacteria, sack, rack, pack, track.