Definify.com

Webster 1913 Edition

Noun.

An associate or companion; a friend; a partner.

[Obs.]

Misshapen time,

copesmate

of ugly Night.

Shakespeare

Noun.

[cope and mate.] A companion or friend.

copesmate ‎(plural copesmates)

(obsolete) An associate or companion; a friend; a partner.
- 1603, John Florio, translating Michel de Montaigne, Essayes, London: Edward Blount, OCLC 946730821, II.12:
  Tie thy selfe unto that, whereto thou are subject, but tie not him; he is neither thy companion, nor thy brother, nor thy fellow Citizen, nor thy copesmate.