unfunction

unfunction [-fm] name [name ...]

unfunction is a zsh builtin that removes the definition of one or more shell functions from the current session. After removal, calling the function name will result in a "command not found" error unless an external command or alias with the same name exists.This is the zsh equivalent of unset -f in bash and is useful for cleaning up function definitions, reloading modified function files, or undoing autoloaded functions.

-m

Treat each name as a pattern (using standard zsh pattern-matching) and remove all functions whose names match.

Suppress errors when a given name does not correspond to a defined function.

Only available in zsh. In bash, use unset -f instead. The removal only affects the current shell session and does not modify function definition files. Removing autoloaded functions allows them to be re-autoloaded on next use if the autoload registration is still active.

unfunction was introduced in zsh as a dedicated command for function removal, complementing the autoload and function definition mechanisms in the Z Shell.

autoload(1), unset(1), zsh(1)