abstraction

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abstraction [n]

1)	a concept or idea not associated with any specific instance; "he loved her only in the abstract--not in person"

Synonyms :

abstract

See Also:

concept abstract abstract right absolute teacher thing

2)	the act of withdrawing or removing something

Synonyms :

See Also:

remotion

3)	the process of formulating general concepts by abstracting common properties of instances

Synonyms :

generalisation generalization

See Also:

theorisation extrapolate abstract

4)	an abstract painting

Synonyms :

See Also:

painting

5)	preoccupation with something to the exclusion of all else

Synonyms :

abstractedness

See Also:

absorption reverie

6)	a general concept formed by extracting common features from specific examples

Synonyms :

See Also:

abstract time space attribute relation amount set

From The Free On-line Dictionary of Computing: (http://www.foldoc.org/, Editor Denis Howe)

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.

(1998-06-04)

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