All 4 Uses

stationery
in
The Fountainhead
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His father had owned a stationery store in Stanton.†
Chpt 1.2 *

stationery = paper and envelopes for writing letters
He liked to see his name on the firm's stationery.†
Chpt 1.14
The delivery truck had not left the grounds, when she was at her desk, writing a note on a piece of exquisite stationery.†
Chpt 2.2
A great many philanthropic undertakings and radical publications, run by all sorts of people, had a single connecting link among them, one common denominator: the name of Ellsworth M. Toohey on their stationery.†
Chpt 2.9

Definitions:

(1) (stationery)
paper and envelopes for writing letters

Stationery is commonly confused with stationary; i.e., remaining still. The words are pronounced identically, so be sure to note the spelling. It might help to remember which is which, by thinking "First sit still; then write."
(2) (meaning too rare to warrant focus)