if a sound echoes, you hear it again because it was made near something such as a wall or hill:
The sound of an engine echoed back from the thick forest.
He could hear eerie noises echoing through the corridors.
if a place echoes, it is filled with sounds that are repeated or are similar to each other
The house echoed with the sound of children's voices.
3 [transitive] literary
to repeat what someone else has just said:
'You bet,' she said, echoing his words.
to repeat an idea or opinion because you agree with it:
The article simply echoed the NRA's arguments against gun control.