life or death

/laɪf ɔr dɛθ/
adjective
  1. Involving the possibility of death; extremely serious or urgent.
    • The climbers knew their next move was a life-or-death decision.
    • The soldier faced a life-or-death choice in the heat of battle.
    • Doctors in the emergency room deal with life-or-death situations daily.
  2. Of the utmost importance; critical to the outcome.
    • The election was seen as a life-or-death struggle for the party's future.
    • For the endangered species, habitat protection is a life-or-death issue.
    • Getting the funding right is a life-or-death matter for the project.
Antonyms
What does "life or death" mean? | whatsthatwordmean | whatsthatwordmean