walls have ears
used to warn people to be careful what they say, because other people, especially enemies, could be listening

[TahlilGaran] Dictionary of Contemporary English ▲

Walls have ears.
something that you say in order to warn someone to be careful what they say because someone may be listening.
Why don't we go and talk about this somewhere quieter? Walls have ears, you know.

[TahlilGaran] English Idioms Dictionary ▲

Walls have ears
Someone may hear us.
"Walls have ears and you should think carefully about what you say when you are talking about your co-workers."

[TahlilGaran] English Idioms Dictionary ▲

walls have ears
be careful what you say because someone may be listening
We were told that walls have ears when our supervisor heard us talking in the hall.

[TahlilGaran] English Idioms Dictionary ▲

walls have ears
Sometimes one's most confidential conversations are overheard.
"Be careful what you say," he whispered. "Remember that walls have ears."

[TahlilGaran] English Idioms Dictionary ▲