[1] : The Collaborative International Dictionary of English v.0.48

vision \vi"sion\, n. oe. visioun, f. vision, fr. l. visio, from
   videre, visum, to see: akin to gr. ? to see, ? i know, and e.
   wit. see wit, v., and cf. advice, clairvoyant, envy,
   evident, provide, revise, survey, view, visage,
   visit.
   1. the act of seeing external objects; actual sight.
      1913 webster

            faith here is turned into vision there. --hammond.
      1913 webster

   2. physiol. the faculty of seeing; sight; one of the five
      senses, by which colors and the physical qualities of
      external objects are appreciated as a result of the
      stimulating action of light on the sensitive retina, an
      expansion of the optic nerve.
      1913 webster

   3. that which is seen; an object of sight. --shak.
      1913 webster

   4. especially, that which is seen otherwise than by the
      ordinary sight, or the rational eye; a supernatural,
      prophetic, or imaginary sight; an apparition; a phantom; a
      specter; as, the visions of isaiah.
      1913 webster

            the baseless fabric of this vision.   --shak.
      1913 webster

            no dreams, but visions strange.       --sir p.
                                                  sidney.
      1913 webster

   5. hence, something unreal or imaginary; a creation of fancy.
      --locke.
      1913 webster

   arc of vision astron., the arc which measures the least
      distance from the sun at which, when the sun is below the
      horizon, a star or planet emerging from his rays becomes
      visible.

   beatific vision theol., the immediate sight of god in
      heaven.

   direct vision opt., vision when the image of the object
      falls directly on the yellow spot see under yellow;
      also, vision by means of rays which are not deviated from
      their original direction.

   field of vision, field of view. see under field.

   indirect vision opt., vision when the rays of light from
      an object fall upon the peripheral parts of the retina.

   reflected vision, or refracted vision, vision by rays
      reflected from mirrors, or refracted by lenses or prisms,
      respectively.

   vision purple. physiol. see visual purple, under
      visual.
      1913 webster
see also:
wit advice clairvoyant envy evident provide 
revise survey view visage visit 
arc of vision beatific vision direct vision yellow field of vision 
field indirect vision reflected vision refracted vision vision purple 
visual purple visual 

[2] : The Collaborative International Dictionary of English v.0.48

vision \vi"sion\, v. t. imp.  p. p. visioned; p. pr.  vb.
   n. visioning.
   to see in a vision; to dream.
   1913 webster

         for them no visioned terrors daunt,
         their nights no fancied specters haunt.  --sir w.
                                                  scott.
   1913 webster
see also:
visioned visioning 

[3] : WordNet (r) 2.0

vision
     n 1: a vivid mental image; "he had a vision of his own death"
     2: the ability to see; the faculty of vision syn: sight, visual
        sense, visual modality
     3: the perceptual experience of seeing; "the runners emerged
        from the trees into his clear vision"; "he had a visual
        sensation of intense light" syn: visual sensation
     4: the formation of a mental image of something that is not
        perceived as real and is not present to the senses;
        "popular imagination created a world of demons";
        "imagination reveals what the world could be" syn: imagination,
         imaginativeness
     5: a religious or mystical experience of a supernatural
        appearance; "he had a vision of the virgin mary"
see also:
sight visual sense visual modality visual sensation imagination imaginativeness 

[4] : Moby Thesaurus II by Grady Ward, 1.0

186 moby thesaurus words for "vision":
   masan, vorstellung, apocalypse, apparition, appearance, astral,
   astral spirit, bad dream, bamboozlement, banshee, befooling,
   bluffing, brainchild, brown study, bubble, calculated deception,
   chimera, circumvention, conceive, concept, conception,
   conceptualization, conning, control, daydream, deceiving,
   deception, deceptiveness, defrauding, delirium, delusion,
   delusiveness, departed spirit, disembodied spirit, dream, dupery,
   duppy, dybbuk, eidetic image, eidolon, enmeshment, ensnarement,
   entanglement, entrapment, envisage, envisaging, envision,
   envisioning, epitome, eye, eyeful, eyesight, fallaciousness,
   fallacy, false image, falseness, fancy, fantasque, fantasy,
   feature, fiction, figment, figure, flimflam, flimflammery,
   fond illusion, fooling, foresight, foresightedness, form, ghost,
   grateful dead, guide, hallucination, hant, haunt, hoodwinking,
   idea, idle fancy, idolum, illusion, image, imagery, imagery study,
   imagination, imagine, imaging, imagining, imagism,
   imagistic poetry, immateriality, incorporeal, incorporeal being,
   incorporeity, incubus, insight, insubstantial image, invention,
   kidding, larva, lemures, lifelike image, maggot, make-believe,
   manes, materialization, mental image, mental picture,
   mental representation, mirage, muse, myth, nightmare,
   objectification, oni, oracle, outwitting, overreaching, perception,
   perspective, phantasm, phantasma, phantasmagoria, phantom, phasm,
   phenomenon, picture, picturing, pipe dream, plan, poem,
   poetic imagery, poltergeist, presence, prophecy, putting on,
   realize, revenant, reverie, romance, scheme, seeing,
   self-deception, shade, shadow, shape, shrouded spirit, sick fancy,
   sight, snow job, song and dance, specter, spectral ghost, spirit,
   spoofery, spoofing, spook, sprite, subterfuge, swindling,
   theophany, thick-coming fancies, thing of beauty, trickiness,
   tricking, trip, understanding, unsubstantiality, vapor,
   victimization, view, visual image, visualization, visualize,
   waking dream, walking dead man, wandering soul, whim, whimsy,
   wildest dream, wildest dreams, willful misconception,
   wishful thinking, word-painting, wraith, zombie

[5] : Easton's 1897 Bible Dictionary

vision
   luke 1:22, a vivid apparition, not a dream comp. luke 24:23;
   acts 26:19; 2 cor. 12:1.
   

Night Vision >> N Words
Night Vision, definition of term: Night Vision
night+vision_pag1.html

Beatific Vision >> B Words
Beatific Vision, definition of term: Beatific Vision
beatific+vision_pag1.html