1. Noun, Suru verb, Intransitive verb

   1.

   echo; reverberation

2. Noun

   2.

   response; reaction; repercussions; sensation

3. Wikipedia definition

   3.

   Echo (phenomenon)

Example sentences

• そのニュースは大反響を呼んだ。

  The news caused a great sensation.

• 話し声が壁に反響してうるさいな、この部屋。

  This room is noisy. The sound bounces right off the walls.