To become wider or larger; to expand.
To speak largely and copiously; to dwell in narration; to enlarge; with "on" or "upon".
To enlarge; to make bigger.
To use a dilator to widen (something, such as a vagina).
To be raised up; to grow larger.
To augment or make something greater.
To take up contrast agent (for an organ, tissue, or lesion).
To improve something by adding features.