adv. phr. Until you are almost dead; near to dying. The bear clawed the hunter within an inch of his life. Often used after "to". The prize fighter was beaten to within an inch of his life.
WITHIN AN INCH OF ONE'S LIFE
Meaning of WITHIN AN INCH OF ONE'S LIFE in English
American idioms English vocabulary. Английский словарь американских идиом. 2012