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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(31) She gently kneaded the muscles in his back.
(32) I gave the textbook back to him.
(33) We retreated back down the mountain.
(34) Let me get my breath back.
(35) Movement can be painful when you've hurt your back.
(36) Flinging back her head, she laughed and laughed.
(37) I'll see you when I get back.
(38) She sank back against/into the cushions.
(39) The back is shaped to the load.
(40) Don't forget to bring sth. back for me.
(41) The two ends buckle at the back.
(42) He took a tortuous route through back streets.
(43) Couldn't hold back my tears, still strong smile.
(44) Don't be a back seat driver.
(45) My efforts to go back to sleep proved futile.
(46) Would you please stand back and let me through.
(47) She led the horse back into the stable.
(48) I tie back my hair when I'm cooking.
(49) I'll be back in a minute.
(50) He turned his back and sulked.
(51) Back of the breakwater the dredger was working.
(52) Suddenly all my fears came flooding back.
(53) He shifted his weight onto his back foot.
(54) They keep chickens in the back yard.
(55) We all filed back to our seats in silence.
(56) He pushed his chair back and stood up.
(57) Don't you dare come back again!
(58) She hauled her backpack onto her back.
(59) 'I'll be back soon(sentencedict .com),' she promised.
(60) Can you do anything for my bad back, doctor?
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.