Definitions of collimate
  1. verb
    make or place parallel to something
    synonyms: parallel
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    type of:
    alter, change, modify
    cause to change; make different; cause a transformation
  2. verb
    adjust the line of sight of (an optical instrument)
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    type of:
    adjust, align, aline, line up
    place in a line or arrange so as to be parallel or straight
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