All 3 Uses

abstract
in
Cat's Eye
(Edited)

They have abstract art earrings, hair arrangements.
p. 94.1

abstract = not imitating objects of nature
...a full cotton skirt of a dull blue-green with abstract black swirls and squares on it,
p. 327.1 *
On its surface are arranged, seemingly at random, several bright pink objects not unlike those to be found in abstract paintings.
p. 445.3

Definitions:

(1) (abstract as in: abstract thought)
of a concept or idea not associated with any specific instance
(2) (abstract as in: read the abstract)
a summary; or to summarize -- especially academic writing
(3) (abstract as in: abstract art)
not imitating external reality or the objects of nature
(4) (abstracted as in: abstracted, so didn't notice)
lost in thought; or distracted by thoughts
(5) (abstracted as in: abstracted his wallet)
removed
(6) (meaning too rare to warrant focus)