Definition of "injector"

One who, or that which, injects something.

1. One who injects (himself or herself with) psychoactive drugs.  examples

2. Any of various devices that are used to inject something, as:

   1. An apparatus by which a stream of water is forced into a steam boiler.  examples

   2. Any of the one or more devices in a fuel injection system that create the spray of fuel.  examples

(object-oriented programming) An object that realizes a dependency injection.  examples