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imaginary

 - 5 dictionary results

im⋅ag⋅i⋅nar⋅y

  [i-maj-uh-ner-ee] adjective, noun, plural -ries.
–adjective
1. existing only in the imagination or fancy; not real; fancied: an imaginary illness; the imaginary animals in the stories of Dr. Seuss.
–noun
2. Mathematics. imaginary number.
Use imaginary in a Sentence
Origin:
1350–1400; ME < L imāginārius, equiv. to imāgin-, (s. of imāgō) image + -ārius -ary

Related forms:
im⋅ag⋅i⋅nar⋅i⋅ly, adverb
im⋅ag⋅i⋅nar⋅i⋅ness, noun

Synonyms:
1. fanciful, visionary, shadowy, chimerical, baseless, illusory.

Antonyms:
1. real.

imaginary number

 
–noun Mathematics.
Also called imaginary, pure imaginary number. a complex number having its real part equal to zero.
Origin:
1905–10
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2010.
Cite This Source Link To imaginary
i·mag·i·nar·y   (ĭ-māj'ə-něr'ē)   
adj.  

  1. Having existence only in the imagination; unreal.

  2. Mathematics

    1. Of or being the coefficient of the imaginary unit in a complex number.

    2. Of, involving, or being an imaginary number.

    3. Involving only a complex number of which the real part is zero.

n.   pl. i·mag·i·nar·ies Mathematics
An imaginary number.
i·mag'i·nar'i·ly adv., i·mag'i·nar'i·ness n.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Medical Dictionary

Main Entry: imag·i·nary
Pronunciation: im-'aj-&-"ner-E
Function: adjective
: existing only in imagination : lacking factualreality <imaginary fears> imaginary>
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Science Dictionary
imaginary number   (ĭ-māj'ə-něr'ē)  Pronunciation Key 
A type of complex number in which the multiple of i (the square root of -1) is not equal to zero. Examples of imaginary numbers include 4i and 2 - 3i, but not 3 + 0i (which is just 3). See more at complex number.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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