Definify.com

Webster 1913 Edition

Verb.

To join; to conjoin.

[R.]

Shak.

Verb.

To join with another in the same office.

cojoin ‎(third-person singular simple present cojoins, present participle cojoining, simple past and past participle cojoined)

(rare) To join together; to conjoin.
- c. 1610, William Shakespeare, The Winter's Tale, I.2:
  Then 'tis very credent, Thou may'st coioyne with something.
- 2011, Caitlin Moran, The Times, 2 Apr 2011:
  We had a Volkswagen campervan – the greatest vehicles ever created; a cheerp cupboard on wheels – and when my parents had finished noisily co-joining, they would take us on post-coital journey all across West Wales […].