All 4 Uses

ostentatious
in
A Spool of Blue Thread
(Auto-generated)

Then she lay down and smoothed her covers and ostentatiously closed her eyes, so Red got into bed himself and switched the lamp off.†
p. 28.9 *

ostentatiously = in a manner intended to attract notice and impress others
All of them had inherited Junior's allergy to ostentation, and all of them were convinced that they had better taste than the rest of the world.†
p. 56.5

ostentation = actions intended to attract notice and impress others
"Is it on account of ballet that you're wearing your hair so tight?" he asked, and Elise said, "Yes, Madame O'Leary requires it," and sat up taller—a reed-thin, ostentatiously poised child—and touched the little doughnut on the tippy-top of her head.†
p. 106.9

ostentatiously = in a manner intended to attract notice and impress others
She had an irritating habit of ostentatiously chuckling to herself before she told him something funny, as if she were coaching him to chuckle.†
p. 320.6

Definitions:

(1) (ostentatious)
intended to attract notice and impress others -- especially with wealth in a vulgar way
(2) (meaning too rare to warrant focus)