Both Uses

dilate
in
Great Expectations
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This dilated until it filled the room, and impelled me to take a candle and go in and look at my dreadful burden.†
p. 344.9 *
But, above all, I knew that there was a constant tendency in all these people,—who, when I was very ill, would present all kinds of extraordinary transformations of the human face, and would be much dilated in size,—above all, I say, I knew that there was an extraordinary tendency in all these people, sooner or later, to settle down into the likeness of Joe.†
p. 493.3

Definitions:

(1) (dilate as in: dilated eyes)
widen or expand
(2) (meaning too rare to warrant focus)
Much more rarely, dilate can mean to add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing.