/sys$common/syshlp/helplib.hlb MACRO, VAX MACRO Assembler, Directives, .MDELETE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Deletes the definitions of specified macros.

      .MDELETE macro-name-list

    macro-name-list

    A list of macros whose definitions are to be deleted.   Separate
    the names with commas.

    .MDELETE completely deletes the macro, freeing memory  as
    necessary. Macro redefinition with .MACRO merely redefines the
    macro.