(1):

(v. t.) To cast or throw; - with on.

(2):

(v. t.) To throw in; to dart in; to force in; as, to inject cold water into a condenser; to inject a medicinal liquid into a cavity of the body; to inject morphine with a hypodermic syringe.

(3):

(v. t.) Fig.: To throw; to offer; to propose; to instill.

(4):

(v. t.) To fill (a vessel, cavity, or tissue) with a fluid or other substance; as, to inject the blood vessels.