Dilate vs Spread_out - What's the difference?

Dilate is a synonym of spread_out.

is that dilate is while spread_out is (idiomatic|intransitive) become further apart.

(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

(idiomatic) Become further apart.

The police spread out to search a wider area.

(idiomatic) To place items further apart.

Spread''' the cards '''out and then turn two of them over at random.

In the transitive sense 2, the object may appear before or after the particle. If the object is a pronoun, then it must be before the particle.