1 thunder /ˈθʌndɚ/ noun
1 thunder
Learner's definition of THUNDER
[noncount] : the very loud sound that comes from the sky during a storm : the sound that follows a flash of lightning
[singular] : a loud noise that sounds like thunder

a face like thunder

: a face that looks very angry

steal someone's thunder

: to prevent someone from having success or getting a lot of attention, praise, etc., by doing or saying whatever that person was planning to do or say
2 thunder /ˈθʌndɚ/ verb
thunders; thundered; thundering
2 thunder
thunders; thundered; thundering
Learner's definition of THUNDER
[no object] : to produce thunder
[no object]
: to make a loud sound like the sound of thunder
always followed by an adverb or preposition : to move in a way that makes a very loud sound
[+ object] : to shout (something) very loudly