From Longman Dictionary of Contemporary Englishdisappear/vanish into thin airdisappear/vanish into thin airDISAPPEARto disappear completely in a mysterious way Victor and his kidnappers had vanished into thin air. → thin
Examples from the Corpus
disappear/vanish into thin air• As happened during and after the first war of independence, the money has disappeared into thin air.• It was almost as if he'd vanished into thin air.• Maybe each and every one of them had vanished into thin air.• The Cheshire cat is an odd character and he causes confusion when he literally disappears into thin air.• Victor and his kidnappers had disappeared into thin air.• Yet he seemed to disappear into thin air.• You can tell these mysterious trails were not made yesterday, because of the way they seem to disappear into thin air.• The money which has suddenly and mysteriously become available simply vanishes into thin air as Ruggiero Miletti magically reappears. 