Source : Webster's Revised Unabridged Dictionary (1913)

Sociate \So"ci*ate\, a. [L. sociatus, p. p. of sociare to
   associate, fr. socius companion.]
   Associated. [Obs.]

Sociate \So"ci*ate\, n.
   An associate. [Obs.]

         As for you, Dr. Reynolds, and your sociates. --Fuller.

Sociate \So"ci*ate\, v. i.
   To associate. [Obs.] --Shelford.