Dilate vs Expound - What's the difference?

Dilate is a related term of expound.

is that dilate is while expound is to lay open; to expose to view; to examine or exposit.

(dilat)

To enlarge; to make bigger.

The eye doctor put drops in my eye to dilate the pupil so he could see the nerve better.

To become wider or larger; to expand.

His heart dilates and glories in his strength.

(ambitransitive) To speak largely and copiously; to dwell in narration; to enlarge; with "on" or "upon".

* Shakespeare

Do me the favour to dilate at full / What hath befallen of them and thee till now.

* Crabbe

But still on their ancient joys dilate .

* dilatability * dilatable * dilation * dilative

(en verb)

To lay open; to expose to view; to examine or exposit.

To lay open the meaning of; to explain or discuss at length; to clear of obscurity; to interpret.