Pronunciation: (thun'dur),[key] —n. 1. a loud, explosive, resounding noise produced by the explosive expansion of air heated by a lightning discharge.
2. any loud, resounding noise: the thunder of applause. 3. a threatening or startling utterance, denunciation, or the like.
4. steal someone's thunder, a. to use for one's own purposes and without the knowledge or permission of the originator the inventions or ideas of another.
b. to ruin or detract from the effect of a performance, remark, etc., by anticipating it.
—v.i. 1. to give forth thunder (often used impersonally with it as the subject): It thundered last night. 2. to make a loud, resounding noise like thunder: The artillery thundered in the hills. 3. to utter loud or vehement denunciations, threats, or the like.
4. to speak in a very loud tone.
5. to move or go with a loud noise or violent action: The train thundered through the village.
—v.t. to strike, drive, inflict, give forth, etc., with loud noise or violent action.