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backside

Definitions of backside
  1. noun
    the side of an object that is opposite its front
    synonyms: back end, rear
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    Antonyms:
    forepart, front, front end
    the side that is forward or prominent
    types:
    nape, nucha, scruff
    the back side of the neck
    rearward
    direction toward the rear
    type of:
    face, side
    a surface forming part of the outside of an object
  2. noun
    the fleshy part of the human body that you sit on
    synonyms: ass, behind, bottom, bum, buns, butt, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tail end, tooshie, tush
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    type of:
    body part
    any part of an organism such as an organ or extremity
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