Type Atype A
a personality type characterized by drive, impatience, aggression, etc., traits thought to make one more susceptible to stress
Origin of Type Afirst used (c. 1974) by M. Friedman and R. Rosenman, United States physicians
or Type A
Of or relating to a personality or behavior pattern that is marked by tenseness, impatience, and aggressiveness and is thought to be associated with an increased risk factor for heart disease.
A person who has this personality or exhibits this behavior pattern.