Definitions of stand-in
  1. noun
    someone who takes the place of another (as when things get dangerous or difficult)
    “the star had a stand-in for dangerous scenes”
    synonyms: backup, backup man, fill-in, relief, reliever, substitute
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    locum, locum tenens
    someone (physician or clergyman) who substitutes temporarily for another member of the same profession
    double, stunt man, stunt woman
    a stand-in for movie stars to perform dangerous stunts
    alternate, replacement, surrogate
    someone who takes the place of another person
    type of:
    compeer, equal, match, peer
    a person who is of equal standing with another in a group
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