defstring – Define macros as verbatim macros
The command \defstring defines its first argument (a control sequence name) as the content of its second argument, with category code ‘other’, with surrounding braces added.
Maybe you are interested in the following packages as well.
- getoptk: Define macros with sophisticated options
- unouter: Suppress \outer flags in Plain TeX
- inlinedef: Inline expansions within definitions
- xnewcommand: Define \global and \protected commands with \newcommand