To make a loud, deep cry, especially from pain, anger, or other strong emotion.
To laugh in a particularly loud manner.
The audience roared at his jokes.
Of animals (especially the lion), to make a loud deep noise.
The lioness roared to scare off the hyenas.
Generally, of inanimate objects etc., to make a loud resounding noise.
To proceed vigorously.
To cry aloud; to proclaim loudly.
To be boisterous; to be disorderly.
To make a loud noise in breathing, as horses do when they have a certain disease.
(North Midlands) to cry