at death's door
idiomPart ofdeath
at death's door — idiom
1. so ill or weak that you might die soon
1.idiom
Definition
so ill or weak that you might die soon
Example
After two weeks with a terrible fever, the old woman was at death's door before the medicine finally started working.
The cat looked as though she was at death's door, but after a warm meal and a night's sleep she was running around again.