Block Comments in Clojure

Actually, there is a way!

(comment

(defn hey []
  ("Hey there!"))

Check me out!
)

Just wrap your comments in (comment ..) :)

Have fun!

Clojure supports a #_ reader macro which completely skips the next form. This is mentioned on the page about the Clojure Reader. There is also the comment macro which has a similar effect, but is implemented differently.

Both the above require that the thing that you're commenting out is otherwise a syntactically correct S-expression.

Some Lisp dialects have a multi-line comment that can contain arbitrary text, but I don't see one for Clojure.