What is the act of opening the mouth convulsively to catch the breath; a labored respiration; a painful catching of the breath. At the last gasp, at the point of death. Addison called?

gasp — The act of opening the mouth convulsively to catch the breath; a labored respiration; a painful catching of the breath. At the last gasp, at the point of death. Addison. (Webster's 1913.)