co- - definition and synonyms

prefix 

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/kəʊ/
  1. 1
    together: used with some nouns, verbs, and adjectives

    coeducation (=the education of boys and girls together)

    cohabiting couples (=people living together without being married)

     Synonyms and related words
  2. 2
    sharing a job or responsibility: used with some nouns, verbs, and adjectives

    her co-star (=another main actor taking part with her in the film)

    my co-driver (=someone who drives so that I can rest)

     Synonyms and related words