To administer an injection to (someone or something), especially of medicine or drugs.
To introduce (code) into an existing program or its memory space, often without tight integration and sometimes through a security vulnerability.
To take or be administered something by means of injection, especially medicine or drugs.
To introduce (something) suddenly or violently.
To push or pump (something, especially fluids) into a cavity or passage.
To introduce or add (something that is different or foreign).
To treat (a person or an animal) with a vaccine to produce immunity against a disease.