Participant \Par*tic"i*pant\, n. A participator; a partaker.
Participants in their . . . mysterious rites. --Bp. Warburton.
Source: Webster's Revised Unabridged Dictionary (1913)
Participant \Par*tic"i*pant\, a. [L. participans, p. pr. of participare: cf. F. participant. See Participate.] Sharing; participating; having a share of part. --Bacon.