Both Uses

ostentatious
in
The Sunlight Dialogues
(Auto-generated)

Freeman darted in behind them, and a moment later darted out again and came ostentatiously sneaking, smiling joyfully, back to Hodge.†
Chpt 13 *

ostentatiously = in a manner intended to attract notice and impress others
Leaving no tip—he never left tips except to impress—he carried his restaurant check to the ornate, ostentatiously large black cash-register, long obsolete but still very grand, counted out the exact change, and went out to the street without a word.†
Chpt 14

Definitions:

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