vi·sion·ar·y

[vizh-uh-ner-ee] adjective, noun, plural vi·sion·ar·ies.
adjective
1.
given to or characterized by fanciful, not presently workable, or unpractical ideas, views, or schemes: a visionary enthusiast.
2.
given to or concerned with seeing visions.
3.
belonging to or seen in a vision.
4.
unreal; imaginary: visionary evils.
5.
purely idealistic or speculative; impractical; unrealizable: a visionary scheme.
6.
of, pertaining to, or proper to a vision.
noun
7.
a person of unusually keen foresight.
8.
a person who sees visions.
9.
a person who is given to audacious, highly speculative, or impractical ideas or schemes; dreamer.
00:10
Visionary is always a great word to know.
So is quincunx. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.

Origin:
1640–50; vision + -ary

vi·sion·ar·i·ness, noun
non·vi·sion·ar·y, adjective, noun
un·vi·sion·ar·y, adjective


1. impractical, impracticable. 4. fancied, illusory, chimerical. 5. unrealistic.


1. practical.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
visionary (ˈvɪʒənərɪ) [Click for IPA pronunciation guide]
 
adj
1.  marked by vision or foresight: a visionary leader
2.  incapable of being realized or effected; unrealistic
3.  (of people) characterized by idealistic or radical ideas, esp impractical ones
4.  given to having visions
5.  of, of the nature of, or seen in visions
 
n , -aries
6.  a visionary person
 
'visionariness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

visionary
"able to see visions," 1651, from vision (q.v.). Meaning "impractical" is attested from 1727. The noun is attested from 1702, from the adj., originally "one who indulges in impractical fantasies."
Online Etymology Dictionary, © 2010 Douglas Harper
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Slang Dictionary

visionary

n.
1. One who hacks vision, in the sense of an Artificial Intelligence researcher working on the problem of getting computers to `see' things using TV cameras. (There isn't any problem in sending information from a TV camera to a computer. The problem is, how can the computer be programmed to make use of the camera information? See SMOP, AI-complete.)
2. [IBM] One who reads the outside literature. At IBM, apparently, such a penchant is viewed with awe and wonder.
FOLDOC
Computing Dictionary

visionary definition


1. One who hacks vision, in the sense of an Artificial Intelligence researcher working on the problem of getting computers to "see" things using TV cameras. (There isn't any problem in sending information from a TV camera to a computer. The problem is, how can the computer be programmed to make use of the camera information? See SMOP, AI-complete.)
2. [IBM] One who reads the outside literature. At IBM, apparently, such a penchant is viewed with awe and wonder.
[Jargon File]

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
Wired caught up with the pop visionary via email to get his take on the
  importance of controlling your own product.
We asked the visionary scientists on our advisory board what new trends will
  shape the decades to come.
Visionary leader knows best practices for urban, commuter, community and
  technical college students.
But what they have not demonstrated is that they have a visionary at or
  anywhere near the helm.
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