noun
thunder; thunderclap; crash of thunder
Refers to the sound of thunder, often in descriptive or literary contexts. More formal than 雷 (かみなり), which can also mean lightning.
遠くで雷鳴がとどろいた。
Thunder rumbled in the distance.
突然の雷鳴に驚いて飛び
I jumped up, startled by a sudden crash of thunder.