To make plain, manifest, or intelligible; to clear of obscurity; to illustrate the meaning of.
To give a valid excuse for past behavior.
To make something plain or intelligible.
To open (anything covered or closed); to lay open to view or contemplation; to bring out in all the details, or by successive development.
To undo a folding.
To release from a fold or pen.
To turn out; to happen; to develop.
To reveal.
In functional programming, a kind of higher-order function that is the opposite of a fold.