All 9 Uses of

uniform

in

1984, by Orwell

He went back to the table, dipped his pen, and wrote: To the future or to the past, to a time when thought is free, when men are different from one another and do not live alone — to a time when truth exists and what is done cannot be undone: From the age of uniformity, from the age of solitude, from the age of Big Brother, from the age of doublethink — greetings!
p. 28.1

uniformity = everyone being the same

The possibility of enforcing not only complete obedience to the will of the State, but complete uniformity of opinion on all subjects, now existed for the first time.
p. 206.2 *

uniformity = consistency (being the same)

Uses with a meaning too common or too rare to warrant foucs:

He moved over to the window: a smallish, frail figure, the meagreness of his body merely emphasized by the blue overalls which were the uniform of the party.†
p. 2.4

uniform = clothing of distinctive design worn by members of a particular group as a means of identification

Both of them were dressed in the blue shorts, grey shirts, and red neckerchiefs which were the uniform of the Spies.†
p. 23.1 *

Nearly everyone was ugly, and would still have been ugly even if dressed otherwise than in the uniform blue overalls.†
p. 60.2

This was the uniform of the capitalists, and no one else was allowed to wear it.†
p. 73.1

As they drifted down the crowded pavements, not quite abreast and never looking at one another, they carried on a curious, intermittent conversation which flicked on and off like the beams of a lighthouse, suddenly nipped into silence by the approach of a Party uniform or the proximity of a telescreen, then taken up again minutes later in the middle of a sentence, then abruptly cut short as they parted at the agreed spot, then continued almost without introduction on the following day.†
p. 128.5

The square was packed with several thousand people, including a block of about a thousand schoolchildren in the uniform of the Spies.†
p. 180.7

It preaches a contempt for the working class unexampled for centuries past, and it dresses its members in a uniform which was at one time peculiar to manual workers and was adopted for that reason.†
p. 216.4

Definitions:

(1) (uniform as in: uniform consistency)
consistent (the same in some way)
(2) (meaning too common or rare to warrant focus)
more commonly, uniform refers to clothing of distinctive design worn by members of a particular group as a means of identification. For example, an army uniform.