Found:

intension

**SEMANTICS: **a technical term for meaning, used in opposition to the
notion **extension**. The extension of an
expression is the class of objects to which that expression refers, the
intension is the abstract concept or property which determines the applicability
of the expression and hence the extension. In
**intensional logic** and
**Montague Grammar** the intension of
an expression is a function which gives the extension in every possible world.

LIT. | Gamut, L.T.F. (1991) |