life-or-deathRate this phrase:(1.00 / 1 vote)Say it
Of critical importance to the survival of a living organism.

Good camoflouge is life-of-death for many animals in the wild.

Additional definitions for 'life-or-death':

life-or-deathHaving death as a possible or even likely outcome; perilous.
life-or-deathOf critical importance to the success of a particular endeavor.
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"life-or-death." Phrases.net. STANDS4 LLC, 2017. Web. 23 Nov. 2017. <http://www.phrases.net/phrase/life-or-death_13501>.

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