Synonyms of back in English:

back

noun

  • 1 she's broken her back
    spine, backbone, spinal column, vertebral column
  • 2 the back of the house
    rear, rear side, other side;
    Nautical stern
    [Antonyms] front
  • 3 the back of the line
    [Antonyms] front, head
  • 4 the back of a postcard
    reverse, other side, underside;
    informal flip side
    [Antonyms] front, face
  • adverb

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  • 1 he pushed his chair back
    backward, behind one, to one's rear, rearward;
    away, off
    [Antonyms] forward
  • 2 a few months back
    ago, earlier, previously, before, in the past
  • verb

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  • 1 the government backed the initiative with $4 million
    sponsor, finance, put up the money for, fund, subsidize, underwrite, be a patron of, act as guarantor of
    informal foot the bill for, pick up the tab for
    bankroll, stake
  • 2 most people backed the idea
    support, endorse, sanction, approve of, give one's blessing to, smile on, favor, advocate, promote, uphold, champion;
    vote for, ally oneself with, stand behind, stick by, side with, be on the side of, defend, take up the cudgels for;
    second
    [Antonyms] oppose
  • 3 he backed the horse at 33–1
    bet on, gamble on, stake money on
  • 4 he backed out of the garage
    reverse, draw back, step back, move backward, back off, pull back, retreat, withdraw, give ground, backtrack, retrace one's steps, recede
    [Antonyms] move forward, advance
  • adjective

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  • 1 the back seats
    [Antonyms] front
  • 2 a back copy
    past, old, previous, earlier, former, out of date
    [Antonyms] future
  • Word links

    dorsal, lumbar relating to the back
    supine lying on your back

    Phrases

    back away

    there's no need to back away—he's a very gentle dog
    draw back, step back, move away, withdraw, retreat, pull back, give ground;
    shrink back, cower, quail, quake

    back down

    all your begging is useless because I am not going to back down
    give in, concede defeat, surrender, yield, submit, climb down, concede, reconsider;
    backtrack, backpedal

    back out of

    Charlie's backed out of the original agreement
    renege on, go back on, withdraw from, pull out of, retreat from, fail to honor, abandon, default on, repudiate, backpedal on

    back someone up

    I was surprised when it turned out to be Dina who backed me up
    support, stand by, give one's support to, side with, be on someone's side, take someone's side, take someone's part;
    vouch for

    back something up

    can you back up that statement with any real evidence?
    substantiate, corroborate, confirm, support, bear out, endorse, bolster, reinforce, lend weight to

    behind someone's back

    the takeover was planned behind the plant manager's back
    secretly, without someone's knowledge, on the sly, slyly, sneakily, covertly, surreptitiously, furtively

    Definition of back in: