[agent-sb., in L. form, f. collabōrāre to COLLABORATE: prob. after F. collaborateur.] One who works in conjunction with another or others; esp. in literary, artistic or scientific work.

1

1802.  Bentham, Wks., X. 395. He was a collaborator of Mirabeau’s.

2

1884.  Symonds, Shaks. Predecessors, x. § 4. 370. [Shakspere] was probably engaged as a collaborator with unknown poets in the preparation of new plays.

3