I like answers one and four out of the following, but I guess it's one of those things! Google says:
Definitions of
abstract art on the Web:
[size=-1]Art that departs significantly from natural appearances. Forms are modified or changed to varying degrees in order to emphasize certain qualities or content. Recognizable references to original appearances may be slight. The term is also used to describe art that is nonrepresentational.
www.ackland.org/tours/classes/glossary.html[/size][size=-1]
Any art in which the depiction of real objects in nature has been subordinated or entirely discarded, and whose aesthetic content is expressed in formal pattern or structure of shapes, lines,and colors. Sometimes the subject is real but so stylized, blurred, repeated, or broken down into basic forms as to be unrecognizable.
www.tuhsd.k12.az.us/Mountain_Pointe_HS/art/adams/Intro_Comp_Art/artterms.html[/size][size=-1]
Any art in which real objects in nature are represented in a way that wholly or partially neglects their true appearance and expresses it in a form of sometimes unrecognizable patterns of lines, colors and shapes. View our collection of contemporary abstract paintings
www.worldimages.com/art_glossary.php[/size][size=-1]
Art in which the subject is color, line, and shape rather than recognizable forms or a picture you can identify.
www.chgs.umn.edu/Educational_Resources/Curriculum/Witness___Legacy_-_Educators__/Art_Terms/art_terms.html[/size][size=-1]
Works in which objects, people, and/or places are depicted in simplified arrangements of shapes, lines, textures, and/or colors. Abstract art may or may not bear a resemblance to its subject.
projects.edtech.sandi.net/montgomery/mysteriousmasks/art_terms.htm[/size][size=-1]
An art expression in which the artistic values reside in the forms in colors rather than in the reproduction or presentation of subject matter.
www.tvdecorators.com/infopages/dictionary.html[/size][size=-1]
A style of art that uses lines, shapes, colours and textures to depict an object without attention to depicting the object in a realistic manner. After- image
www.sasked.gov.sk.ca/docs/artsed/g8arts_ed/g8vgloae.html[/size][size=-1]
The simplification of forms. The subject may be recognisable or, in the case of pure abstraction, totally unrecognisable.
www.stgeorged.det.nsw.edu.au/creativearts/Glossary/glossary.html[/size][size=-1]
Art that presents a subjective view of the world- the artist's emotions or ideas-or art that presents line, color, or shape for its own sake.
highered.mcgraw-hill.com/sites/0072556323/student_view0/glossary.html[/size][size=-1]
An art form which is not dependent upon a fundamentally naturalistic approach to the subject matter for the expression of form, space and color.
www.liberatoreart.com/glossary.html[/size][size=-1]
Abstractionism: an abstract genre of art; artistic content depends on internal form rather than pictorial representation
www.cogsci.princeton.edu/cgi-bin/webwn[/size][size=-1]
Abstract art is now generally understood to mean art that does not depict objects in the natural world, but instead uses shapes and colours in a non-representational or non-objective way. In the early 20th century, the term was more often used to describe art, such as Cubist and Futurist art, that does represent the natural world, but does so by capturing something of its immutable intrinsic qualities rather than by imitating its external appearance. See Abstraction.
en.wikipedia.org/wiki/Abstract_art[/size]