Meaning

• In functional programming, a kind of higher-order function that is the opposite of a fold.

Meaning

• To undo a folding.

  "to unfold a map; to unfold a tablecloth; she unpacks the new dress and unfolds it carefully"

• To turn out; to happen; to develop.

• To reveal.

• 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 unfold one's designs;  to unfold the principles of a science"

• To release from a fold or pen.

  "to unfold sheep"