thunderous applause; storm of applause
A dramatic, fixed expression for extremely loud, enthusiastic applause, often used in speeches or formal contexts.
When his speech ended, the hall was filled with thunderous applause.
大喝采 is a great ovation or acclaim, often used for performances, while 万雷の拍手 specifically emphasizes the loud, thunder-like sound of clapping.
A set phrase combining 万雷 (many thunderclaps) and 拍手 (applause), literally 'applause of ten thousand thunders'.