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]

Moby Thesaurus II by Grady Ward, 1.0:

196 Moby Thesaurus words for "unfold":
   account for, affect, allegorize, amplify, attend, bare,
   be revealed, become of, betoken, branch, branch out, brandish,
   break the seal, breathe, bring forth, bring forward,
   bring into view, bring out, bring to light, bring to notice,
   clarify, clear, clear up, come about, come of, come out, crack,
   dangle, decipher, demonstrate, demythologize, deobstruct, deploy,
   descant, detail, develop, dilate, disclose, discover, dismask,
   disperse, display, dissolve, divulge, dope out, dramatize,
   draw the veil, elaborate, elucidate, embody, enact, end, enlarge,
   enlarge upon, enlighten, ensue, euhemerize, eventuate, evidence,
   evince, evolve, exemplify, exhibit, expand, expatiate, explain,
   explain away, explicate, expose, expose to view, exposit, expound,
   express, extend, fall out, fan, fan out, fare, figure out, flare,
   flaunt, flourish, follow, free, give reason for, give sign,
   give the meaning, give token, happen, highlight, illuminate,
   illustrate, impart, incarnate, indicate, issue, lay bare, lay open,
   let daylight in, let out, make clear, make plain, manifest,
   materialize, mean, occur, open, open up, outspread, outstretch,
   overgrow, overrun, pan out, parade, particularize, patefy, perform,
   popularize, present, produce, prove, prove to be, puzzle out,
   raise the curtain, ramify, rationalize, rehearse in extenso,
   relate at large, represent, resolve, result, reveal, roll out,
   set forth, shed light upon, show, show forth, show how,
   show the way, show up, simplify, solve, spell out, splay,
   spotlight, spraddle, sprangle, sprawl, spread,
   spread like wildfire, spread out, straighten out, stretch out,
   strip bare, take place, terminate, throw light upon, token,
   trot out, turn out, unblock, uncase, unclench, uncloak, unclog,
   unclutch, uncoil, uncork, uncover, uncurtain, undo, undrape,
   unfoul, unfurl, unkennel, unlatch, unlock, unmask, unpack, unplug,
   unravel, unreel, unriddle, unroll, unscreen, unseal, unsheathe,
   unshroud, unshut, unstop, unveil, unwind, unwrap, wave, widen,
   work out



The Free On-line Dictionary of Computing (30 December 2018):

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)