'Injection' definitions:

Definition of 'injection'

From: WordNet
noun
The forceful insertion of a substance under pressure
noun
Any solution that is injected (as into the skin) [syn: injection, injectant]
noun
The act of putting a liquid into the body by means of a syringe; "the nurse gave him a flu shot" [syn: injection, shot]

Definition of 'Injection'

From: GCIDE
  • Injection \In*jec"tion\, n. [L. injectio : cf. F. injection.]
  • 1. The act of injecting or throwing in; -- applied particularly to the forcible insertion of a liquid or gas, by means of a syringe, pump, etc. [1913 Webster]
  • 2. That which is injected; especially, a liquid inserted thrown into a cavity of the body by a syringe or pipe; a clyster; an enema. --Mayne. [1913 Webster]
  • 3. (Anat.) (a) The act or process of filling vessels, cavities, or tissues with a fluid or other substance. (b) A specimen prepared by injection. [1913 Webster]
  • 4. (Steam Eng.) (a) The act of throwing cold water into a condenser to produce a vacuum. (b) The cold water thrown into a condenser. [1913 Webster]
  • Injection cock, or Injection valve (Steam Eng.), the cock or valve through which cold water is admitted into a condenser.
  • Injection condenser. See under Condenser.
  • Injection pipe, the pipe through which cold water is through into the condenser of a steam engine.
  • fuel injection, a method of inserting fuel into internal-combustion engines by directly forcing the liquid fuel into the combustion chamber at an appropriate point in the piston cycle; in contrast to carburetion, in which an air-fuel mixture is drawn in by the downward stroke of the piston. [1913 Webster +PJC]

Synonyms of 'injection'

From: Moby Thesaurus