mouth-to-mouth resuscitation n 1: an emergency procedure consisting of external cardiac massage and artificial respiration; the first treatment for a person who has collapsed and has no pulse and has stopped breathing; attempts to restore circulation of the blood and prevent death or brain damage due to lack of oxygen [syn: {cardiopulmonary resuscitation}, {CPR}, {cardiac resuscitation}, {mouth-to-mouth resuscitation}, {kiss of life}]