To kill by preventing the access of air to the blood through the lungs or analogous organs, as gills.To impede respiration in; compress so as to prevent respiration.To stifle; smother; extinguish: as, to suffocate fire or live coals.Synonyms Stifle, Strangle, etc. See smother.To become choked, stifled, or smothered: as, we are suffocating in this close room.Suffocated; choked.