Definition of "mental reservation" []

• The withholding, or failing to disclose, something that affects a statement, promise, etc., and which, if disclosed, would materially change its import. (noun)

Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)

• "This theory became known as the doctrine of strict mental reservation, to distinguish it from wide mental reservation with which we have thus far been occupied."