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See also: înjection


An injection


Borrowed from Middle French injection, from Latin iniectio.


  • IPA(key): /ɪn.ˈdʒɛk.ʃən/
  • Hyphenation: in‧jec‧tion
  • Rhymes: -ɛkʃən


injection (countable and uncountable, plural injections)

  1. The act of injecting, or something that is injected.
  2. A specimen prepared by injection.
  3. (category theory) A morphism from either one of the two components of a coproduct to that coproduct.
  4. (construction) The act of inserting materials like concrete grout or gravel by using high pressure pumps.
  5. (figuratively) The supply of additional funding to a person or a business.
    The troubled business received a much-needed cash injection.
  6. (mathematics) A relation on sets (X,Y) that associates each element of Y with at most one element of X.
  7. (programming) The insertion of program code into an application, URL, hardware, etc.; especially when malicious or when the target is not designed for such insertion.
    a SQL injection exploit allowing a malicious user to modify a database query
  8. (space science) The act of putting a spacecraft into a particular orbit, especially for changing a stable orbit into a transfer orbit, e.g. trans-lunar injection
  9. (set theory) A function that maps distinct x in the domain to distinct y in the codomain; formally, a fX → Y such that f(a) = f(b) implies a = b for any a, b in the domain.
  10. (specifically, medicine) Something injected subcutaneously, intravenously, or intramuscularly by use of a syringe and a needle.
  11. (steam engines) The act of throwing cold water into a condenser to produce a vacuum.
  12. (steam engines) The cold water thrown into a condenser to produce a vacuum.


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Borrowed from Latin iniectiō, iniectiōnem.


injection f (plural injections)

  1. injection

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