(1):

(v. t.) To partake of; to share in; to receive a part of.

(2):

(v. t.) To impart, or give, or share of.

(3):

(v. i.) To have a share in common with others; to take a part; to partake; - followed by in, formely by of; as, to participate in a debate.

(4):

(a.) Acting in common; participating.