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3. a matter of life and death

a matter of life and death

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a matter of life and death

something that is very important or serious Don't disturb me unless it's matter of life and death.

See also: and, death, life, matter, of

a matter of life and/or death

a serious situation where people could die (not used with the ) The results of the peace negotiations could be a matter of life or death for people in the war zone.

See also: and, death, life, matter, of