The Collaborative International Dictionary of English v.0.48:

Scan \Scan\ (sk[a^]n), v. t. [imp. & p. p. Scanned (sk[a^]nd);
   p. pr. & vb. n. Scanning.] [L. scandere, scansum, to climb,
   to scan, akin to Skr. skand to spring, leap: cf. F. scander.
   Cf. Ascend, Descend, Scale a ladder.]
   1. To mount by steps; to go through with step by step. [Obs.]
      [1913 Webster]

            Nor stayed till she the highest stage had scand.
                                                  --Spenser.
      [1913 Webster]
      [1913 Webster]

   2. Specifically (Pros.), to go through with, as a verse,
      marking and distinguishing the feet of which it is
      composed; to show, in reading, the metrical structure of;
      to recite metrically.
      [1913 Webster]

   3. To go over and examine point by point; to examine with
      care; to look closely at or into; to scrutinize.
      [1913 Webster]

            The actions of men in high stations are all
            conspicuous, and liable to be scanned and sifted.
                                                  --Atterbury.
      [1913 Webster]

   4. To examine quickly, from point to point, in search of
      something specific; as, to scan an article for mention of
      a particular person.
      [PJC]

   5. (Electronics) To form an image or an electronic
      representation of, by passing a beam of light or electrons
      over, and detecting and recording the reflected or
      transmitted signal.
      [PJC]

WordNet (r) 3.0 (2006):

scan
    n 1: the act of scanning; systematic examination of a prescribed
         region; "he made a thorough scan of the beach with his
         binoculars"
    2: an image produced by scanning; "he analyzed the brain scan";
       "you could see the tumor in the CAT scan" [syn: scan, CAT
       scan]
    v 1: examine minutely or intensely; "the surgeon scanned the
         X-ray"
    2: examine hastily; "She scanned the newspaper headlines while
       waiting for the taxi" [syn: scan, skim, rake, glance
       over, run down]
    3: make a wide, sweeping search of; "The beams scanned the night
       sky"
    4: conform to a metrical pattern
    5: move a light beam over; in electronics, to reproduce an image
    6: read metrically; "scan verses"
    7: obtain data from magnetic tapes; "This dictionary can be read
       by the computer" [syn: read, scan]

Moby Thesaurus II by Grady Ward, 1.0:

121 Moby Thesaurus words for "scan":
   alliterate, analysis, assonate, audit, autopsy, block out, browse,
   canvass, cap verses, check, check out, check over, check up on,
   command, con, delve into, detail, dip into, domination, enumerate,
   examination, examine, examine cursorily, eyereach, eyeshot,
   eyesight, field of view, field of vision, flip through,
   give an examination, give the once-over, glance, glance at,
   glance over, glance through, go over, home on, horizon, identify,
   inspect, inspection, investigate, itemize, jingle, ken,
   limit of vision, line of sight, look, look at, look over, map,
   monitor, naked eye, number, observation, observe, outline, outlook,
   outlook over, overhaul, overhauling, overlook, overview,
   page through, parse, pass over, pass over lightly,
   pass under review, peer at, perlustration, perspective, perusal,
   peruse, pick up, pinpoint, pore over, postmortem, prospect,
   quality control, range, receive, reconnaissance, research, resolve,
   review, rhyme, run over, run through, run-through, schematize,
   scope, scope of vision, scrutinize, scrutiny, set an examination,
   sight, sightliness, size, size up, skim, skim over, skip over,
   slip through, slur, slur over, spot, study, survey, sweep,
   take stock of, take the measure, thumb over, thumb through,
   touch upon, touch upon lightly, trigger, tune in, view, visitation,
   vista, zip through



V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

SCAN
       Switched-Circuit Automatic Network


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

SCAN

   1. ["A Parallel Implementation of the SCAN Language",
   N.G. Bourbakis, Comp Langs 14(4):239-254 (1989)].

   2. A real-time language from DEC.

   [Are these the same language?]

   (1994-11-01)


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

scan

   1. (computer peripheral) See scanner.

   2. (circuit design) See scan design.

   3. (functional programming) See scanl, scanr.

   4.  An algorithm for scheduling multiple
   accesses to a disk.  A number of requests are ordered
   according to the data's position on the storage device.  This
   reduces the disk arm movement to one "scan" or sweep across
   the whole disk in the worst case.  The serivce time can be
   estimated from the disk's track-to-track seek time, maximum
   seek time (one scan), and maximum rotational latency.

   Scan-EDF is a variation on this.

   (1995-11-15)