injection

1. (category theory) A morphism from either one of the two components of a coproduct to that coproduct.countableuncountable

2. (construction) The act of inserting materials like concrete grout or gravel by using high pressure pumps.countableuncountable

3. (figuratively) The supply of additional funding to a person or a business.Examples: "The troubled business received a much-needed cash injection."countablefigurativelyuncountable

4. (mathematics) A relation on sets (X,Y) that associates each element of Y with at most one element of X.Synonyms: injective functioncountableuncountable

5. (computer security) The insertion of program code into an application, URL, hardware, etc.; especially when malicious or when the target is not designed for such insertion.Examples: "a SQL injection exploit allowing a malicious user to modify a database query"countableuncountable

6. (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.Examples: "It had been determined that one of the whip turnstile antennas had broken off from Explorer 1 shortly after injection into orbit, so these were eliminated."countableuncountable