> so aside from `def` inside a function (as opposed to `let`) It looks like the examples on the linked page use let, so it definitely seems like it's available

> so aside from `def` inside a function (as opposed to `let`) It looks like the examples on the linked page use let, so it definitely seems like it's available. Fwiw, you can technically use def anywhere in Clojure, it's just not good practice to do so.