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back noun [ bak ]

• the rear surface of the human body from the shoulders to the hips.
• "he lay on his back"
• the side or part of something that is away from the spectator or from the direction in which it moves or faces; the rear.
• "at the back of the hotel is a secluded garden"
Similar: rear, rear side, other side, stern, end, tail end, rear end, tail, far end, tag end,
Opposite: front, head,
• a player in a team game who plays in a defensive position behind the forwards.
• "their backs showed some impressive running and passing"
• the grounds of Cambridge colleges which back on to the River Cam.

back adverb

• in the opposite direction from the one that one is facing or travelling towards.
• "he moved back a pace"
Similar: backwards, behind one, to one's rear, rearwards, away, off,
Opposite: forward,
• so as to return to an earlier or normal position or condition.
• "she put the book back on the shelf"
• in or into the past.
• "he made his fortune back in 1955"
• in return.
• "they wrote back to me"

back verb

• give financial, material, or moral support to.
• "he had a newspaper empire backing him"
Similar: sponsor, finance, put up the money for, fund, subsidize, underwrite, promote, lend one's name to, be a patron of, act as guarantor of, support, foot the bill for, pick up the tab for, bankroll, stake, endorse, sanction, approve of, give one's blessing to, smile on, favour, advocate, uphold, champion, vote for, ally oneself with, stand behind, side with, be on the side of, defend, take up the cudgels for, second, throw one's weight behind, stand by, give one's support to, be on someone's side, take someone's side, take someone's part, vouch for, help, assist, aid,
Opposite: oppose,
• walk or drive backwards.
• "I put the car in reverse and backed down the road"
Similar: reverse, move/drive backwards, backtrack, retrace one's steps, draw back, step back, move away, back off, retreat, withdraw, pull back, give ground, shrink back, blench, cower, quail, quake,
Opposite: move forwards, advance, move forward,
• cover the back of (an article) in order to support, protect, or decorate it.
• "a mirror backed with tortoiseshell"
• lie behind or at the back of.
• "the promenade is backed by lots of cafes"

back adjective

• of or at the back of something.
• "the back garden"
Similar: rear, end, hind, hindmost, rearmost, dorsal, posterior,
Opposite: front,
• from or relating to the past.
• "she was owed back pay"
Similar: past, old, previous, earlier, former, out of date,
Opposite: future,
• directed towards the rear or in a reversed course.
• "a back header"
• (of a sound) articulated at the back of the mouth.
• "a long back vowel, as in 'dance' or 'bath'"
Origin: Old English bæc, of Germanic origin; related to Middle Dutch and Old Norse bak . The adverb use dates from late Middle English and is a shortening of aback.

at someone's back

• in pursuit or support of someone.

back and forth

• to and fro.

back in the day

• in the past; some time ago.
"back in the day, he'd had one of the greatest minds I'd ever come across"

one's back is turned

• one's attention is elsewhere.
"he kissed her quickly, when the landlady's back was turned"

the back of beyond

• a very remote or inaccessible place.

back o'Bourke

• the outback.

the back of one's mind

• used to express that something is in one's mind but is not consciously thought of or remembered.
"she had a little nagging worry at the back of her mind"

back someone into a corner

• force someone into a difficult situation.
"I was backed into a corner—there was no way out"

back to front

• with the back at the front and the front at the back.
"the exhausts had been fitted back to front"

back water

• reverse the action of a boat's oars to slow down or stop.
"the exhausted crews backed water and the fleet fell apart"

back the wrong horse

• make a wrong or inappropriate choice.

behind someone's back

• without a person's knowledge and in an unfair way.
"Carla made fun of him behind his back"

get someone's back up

• make someone annoyed or angry.

have someone's back

• be constantly prepared to offer support or assistance to someone.
"my parents always have my back"

in back

• at the back of something, especially a building.
"my dad demolished a shed in back of his barn"

know something like the back of one's hand

• be entirely familiar with a place or route.

on one's back

• in bed recovering from an injury or illness.

put one's back into

• approach (a task) with vigour.

turn one's back on

• ignore (someone) by turning away from them.

with one's back to the wall

• in a desperate situation.

back away

• move away from someone or something in a backward direction, especially as a result of fear or apprehension.
"the victim tried to back away but was punched by the other man"

back down

• withdraw a claim or assertion in the face of opposition.
"party leaders backed down and rescinded the resolution"

back off

• draw back from action or confrontation.
"just back off and leave me alone"

back on to

• (of a building or other structure) have its back facing or adjacent to something.
"his garage wall backs on to the neighbouring property"

back out

• withdraw from a commitment.
"if he backs out of the deal they'll sue him"

back up

• provide support for someone or something.
"his mother backed him on up everything"



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