(1):

(v. t.) To act the part of; to represent; to play.

(2):

(v. t.) To decree; to establish by legal and authoritative act; to make into a law; especially, to perform the legislative act with reference to (a bill) which gives it the validity of law.

(3):

(v. t.) To act; to perform; to do; to effect.

(4):

(n.) Purpose; determination.