whence

whence [ -vcwfm ] name ...

For each name, indicate how it would be interpreted if used as a command name.

Option	Description
`-v`	Produce a more verbose report.
`-c`	Print the results in a `csh-like` format. This takes precedence over `-v`.
`-w`	For each `name`, print `name`: `word` where `word` is one of alias, builtin, command, functions, `reserved` or none, according as `name` corresponds to an alias, a built-in command, an external command, a shell function, a reserved word, or is not recognised. This takes precedence over `-v` and `-c`.
`-f`	Causes the contents of a shell function to be displayed, which would otherwise not happen unless the `-c` flag were used.
`-m`	The arguments are taken as patterns (should be quoted), and the information is displayed for each command matching one of these patterns.

Note: Due to capability limitations of Zsh, external commands are not recognised by the whence command and its derivatives.