All 5 Uses

materialistic
in
The Screwtape Letters
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They themselves are equally pleased by both errors and hail a materialist or a magician with the same delight.†
Chpt Pref.
S. LEWIS MAGDALEN COLLEGE July 5, 1941 I MY DEAR WORMWOOD, I note what you say about guiding our patient's reading and taking care that he sees a good deal of his materialist friend.†
Chpt 1
Don't waste time trying to make him think that materialism is true!†
Chpt 1
On the other hand, when they believe in us, we cannot make them materialists and sceptics.†
Chpt 7 *
If once we can produce our perfect work—the Materialist Magician, the man, not using, but veritably worshipping, what he vaguely calls "Forces" while denying the existence of "spirits"—then the end of the war will be in sight.†
Chpt 7

Definitions:

(1) (materialistic)
overly concerned with wealth and possessions at the expense of other interests
(2) (meaning too rare to warrant focus)
Less commonly, in philosophy, materialistic can refer to the belief that everything, including our thoughts, are caused by physical effects over which we have no control.