To enlarge; to make bigger.
Example: "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.
Example: "His heart dilates and glories in his strength."
To speak largely and copiously; to dwell in narration; to enlarge; with "on" or "upon".
To use a dilator to widen (something, such as a vagina).
(dismissal, 4chan) expression of anger and contempt, specifically at transgender women.