Abstract art definition

http://pub37.bravenet.com/guestbook/3094117317

... whose aesthetic content is expressed in a formal pattern or structure of shapes, lines and colours

whose aesthetic content expressed formal pattern

History of abstract art

http://pub4.bravenet.com/guestbook/303988375

Intangible subjects such as thoughts, emotions, and time are also expressed in the abstract art form.

intangible subjects such thoughts emotions time expressed abstract art form

Intangible subjects such as thoughts emotions and ...

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abstract also and are art as emotions expressed form in intangible