a matter of life and death Meaning If something is a matter | English Language

a matter of life and death

Meaning
If something is a matter of life and death, it's extremely important and it could involve someone's survival.

For example

Education about HIV and AIDS is a matter of life and death. If people aren't told to protect themselves with condoms, they could die from the disease.

Getting someone to hospital quickly after an accident or a heart attack is a matter of life and death. Just a few minutes can make all the difference.
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