an abstract or general idea or term.
the act of considering something as a general quality or characteristic, apart from concrete realities, specific objects, or actual instances.
an impractical idea; something visionary and unrealistic.
the act of taking away or separating; withdrawal: The sensation of cold is due to the abstraction of heat from our bodies.
secret removal, especially theft.
absent-mindedness; inattention; mental absorption.
Fine Arts.
the abstract qualities or characteristics of a work of art.
a work of art, especially a nonrepresentational one, stressing formal relationships.

1540–50; < Late Latin abstractiōn- (stem of abstractiō) separation. See abstract, -ion

abstractional, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
abstraction (æbˈstrækʃən)
1.  absence of mind; preoccupation
2.  the process of formulating generalized ideas or concepts by extracting common qualities from specific examples
3.  an idea or concept formulated in this way: good and evil are abstractions
4.  logic See also lambda calculus an operator that forms a class name or predicate from any given expression
5.  an abstract painting, sculpture, etc
6.  the act of withdrawing or removing

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

abstraction ab·strac·tion (āb-strāk'shən, əb-)

  1. Distillation or separation of the volatile constituents of a substance.

  2. Exclusive mental concentration; absent-mindedness.

  3. A malocclusion in which the teeth or associated structures are lower than their normal occlusal plane.

  4. The selection of a certain aspect of a concept from the whole.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Computing Dictionary

abstraction definition

1. Generalisation; ignoring or hiding details to capture some kind of commonality between different instances. Examples are abstract data types (the representation details are hidden), abstract syntax (the details of the concrete syntax are ignored), abstract interpretation (details are ignored to analyse specific properties).
2. Parameterisation, making something a function of something else. Examples are lambda abstractions (making a term into a function of some variable), higher-order functions (parameters are functions), bracket abstraction (making a term into a function of a variable).
Opposite of concretisation.
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
The level of abstraction of these head-of-state types amazes me.
Abstraction is inductive thought and involves the construction of options.
Dove, an abstraction pioneer, set a particularly encouraging example.
But he says no amount of academic abstraction will blind him to the qualities
  that make folklore so fascinating.
Images for abstraction
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