What is the meaning of Inject?

To push or pump (something, especially fluids) into a cavity or passage.

To introduce (something) suddenly or violently.

To administer an injection to (someone or something), especially of medicine or drugs.

To take or be administered something by means of injection, especially 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 cast or throw; used with on.

To introduce or add (something that is different or foreign).

Source: wiktionary.org