天てん火かてんかFreq.FrequencyTop 100,000Meanings1nounfire caused by lightningRefers specifically to a fire ignited by a lightning strike. Often used in news reports or historical contexts.昨さく夜やの雷かみなりで天てん火かが発はっ生せいし、山さん林りんが焼やけた。A fire caused by lightning broke out last night and burned the mountain forest.