>>define: Search for meaning of word (on Wiktionary)
>>greet: Given a space-separated list of usernames, greet those users.
>>help: Syntax: `help` or `help <cmd>`. If cmd supports arguments, `help <cmd> <cmd-args>` may be possible
>>kaomoji: Display list of kaomojis supported. With `kaomoji all`, even aliases will be displayed.
>>meta: Search Meta Stack Overflow and Meta Stack Exchange for a query.
>>pause: Given `>>pause 4 minutes`, stop listening for commands for 4 minutes. Many time units are supported. This is a RO-only command.