injection

noun in·jec·tion \in-ˈjek-shən\

: the act or process of forcing a liquid medicine or drug into someone or something by using a special needle

: the act or process of forcing a liquid into something

: the addition of something (such as money) that is needed to support something

Full Definition of INJECTION

a : an act or instance of injecting

b : the placing of an artificial satellite or a spacecraft into an orbit or on a trajectory; also : the time or place at which injection occurs

: something (as a medication) that is injected

: a mathematical function that is a one-to-one mapping — compare bijection, surjection

See injection defined for English-language learners

See injection defined for kids

First Known Use of INJECTION

15th century

Rhymes with INJECTION

abjection, advection, affection, bisection, collection, complexion, confection, connection, convection, correction, cross section, C-section, defection, deflection, dejection, detection, direction, ejection, election, erection, infection, inflection, inspection, midsection, objection, perfection, prelection, projection, protection, refection, reflection, rejection, resection, selection, subjection, subsection, trajection, transection, trisection

INJECTION Defined for Kids

injection

noun in·jec·tion \in-ˈjek-shən\

Definition of INJECTION for Kids

: an act or instance of forcing a fluid (as a medicine) into a part of the body by using a special needle <Insulin can be given by injection.>

Medical Dictionary

injection

noun in·jec·tion \in-ˈjek-shən\

Medical Definition of INJECTION

a : the act or an instance of injecting a drug or other substance into the body b : a solution (as of a drug) intended for injection (as by catheter or hypodermic syringe) either under or through the skin or into the tissues, a vein, or a body cavity c : an act or process of injecting vessels or tissues; also : a specimen prepared by injection

: the state of being injected : congestion—see circumcorneal injection