Topic: METEOROLOGY
| Language: | Old English |
| Origin: | thunor |
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thun‧der1

1
[uncountable]HEM the loud noise that you hear during a storm, usually after a flash of lightning :
[uncountable]HEM2 [singular]CS a loud deep noise :
She heard the thunder of hooves behind her.
She heard the thunder of hooves behind her. ➔ blood-and-thunder