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 inject (a drug) directly into a vein.
To integrate (code, etc.) into the main repository for a software project, rather than separate forks.
To consume voraciously.
In longline fishing the central line to which the branch lines with baits are attached.
An airline's main operating unit, as opposed to codeshares or regional subsidiaries.
The principal route or line of a railway.
A principal vein into which a drug can be injected.
The main repository for a software project, from which different versions (forks) may be split off.
The pipeline carrying wastewater to the public drains or a septic tank.
Normal, principal or standard.
Of or pertaining to the principal route or line of a railway.
Of or pertaining to a surface railway as distinct from an underground, elevated or light rail one.
Of a sequence of opening moves: being part of a main line ("a standard sequence of opening moves considered to be best play").