n.
Pronunciation: in- ' jek-sh ə n
Function: noun
Date: 15th century
1 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
2 : something (as a medication) that is injected
3 : a mathematical function that is a one-to-one mapping ― compare BIJECTION , SURJECTION