The Collaborative International Dictionary of English v.0.48:

Unfold \Un*fold"\, v. t. [AS. unfealdan. See 1st Un-, and
   Fold, v. t.]
   1. To open the folds of; to expand; to spread out; as, to
      unfold a tablecloth.
      [1913 Webster]

            Unfold thy forehead gathered into frowns. --Herbert.
      [1913 Webster]

   2. To open, as anything covered or close; to lay open to view
      or contemplation; to bring out in all the details, or by
      successive development; to display; to disclose; to
      reveal; to elucidate; to explain; as, to unfold one's
      designs; to unfold the principles of a science.
      [1913 Webster]

            Unfold the passion of my love.        --Shak.
      [1913 Webster]

   3. To release from a fold or pen; as, to unfold sheep.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Unfold \Un*fold"\, v. i.
   To open; to expand; to become disclosed or developed.
   [1913 Webster]

         The wind blows cold
         While the morning doth unfold.           --J. Fletcher.
   [1913 Webster]

WordNet (r) 3.0 (2006):

unfold
    v 1: develop or come to a promising stage; "Youth blossomed into
         maturity" [syn: blossom, blossom out, blossom forth,
         unfold]
    2: open to the view; "A walk through town will unfold many
       interesting buildings"
    3: extend or stretch out to a greater or the full length;
       "Unfold the newspaper"; "stretch out that piece of cloth";
       "extend the TV antenna" [syn: unfold, stretch, stretch
       out, extend]
    4: spread out or open from a closed or folded state; "open the
       map"; "spread your arms" [syn: unfold, spread, spread
       out, open] [ant: fold, fold up, turn up]

The Free On-line Dictionary of Computing (19 January 2023):

inline
unfold

    (Or "unfold") To replace a function call with
   an instance of the function's body.  Actual argument
   expressions are substituted for formal parameters as in
   beta reduction.  Inlining is usually done as a
   compile-time transformation.

   If done recklessly (e.g. attempting to inline a recursive
   function) the compiler will fail to terminate.  If done
   over-enthusiastically the code size may increase
   exponentially, e.g. if function f calls g twice, and g calls h
   twice and h is inlined in g which is inlined in f (in either
   order) then there will be four copies of h's body in f.

   See also linear argument, unfold/fold.

   (1994-11-03)