All 6 Uses

anonymous
in
The Crying of Lot 49
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"The artist is anonymous," Bortz said,
Chpt 6 *

anonymous = unknown (people don't know who created the art)
Such a captive maiden, having plenty of time to think, soon realizes that her tower, its height and architecture, are like her ego only incidental: that what really keeps her where she is is magic, anonymous and malignant, visited on her from outside and for no reason at all.†
Chpt 1
That's Inamorati Anonymous.†
Chpt 5
He's anonymous," said the anonymous inamorato.†
Chpt 5
He's anonymous," said the anonymous inamorato.†
Chpt 5
She put in a station call to The Greek Way in San Francisco, gave the musical voice that answered a description of the acned, fuzz-headed Inamorato Anonymous she'd talked to there and waited, inexplicable tears beginning to build up pressure around her eyes.†
Chpt 6

Definitions:

(1) (anonymous as in: an anonymous author)
an unknown person, or of an unknown person -- such as an unknown author, or donation of an unknown person
(2) (anonymous as in: an anonymous, uninteresting house)
lacking individuality or interesting features
(3) (meaning too rare to warrant focus)