Meaning
To keep confidential.
Origin
Refers to keeping written papers or thoughts securely beneath one’s hat.
Examples
Frequently asked questions
What does 'Keep under hat' mean?
To keep confidential.
How do you say 'Keep under hat' in Russian?
Держать в тайне
How do you say 'Keep under hat' in Spanish?
Guardar bajo llave / En secreto
How do you say 'Keep under hat' in French?
Garder sous le coude / Secret