type A

adjective

: relating to, characteristic of, having, or being a personality that is marked by impatience, aggressiveness, and competitiveness and that is held to be associated with increased risk of cardiovascular disease

type A behavior

Word History

First Known Use

1970, in the meaning defined above

Medical Definition

type A

1 of 2 adjective

: relating to, characteristic of, having, or being a personality that is marked by impatience, aggressiveness, and competitiveness and that has been implicated by some studies as a factor increasing the risk of cardiovascular disease

type A behavior

type A

2 of 2 noun

: an individual with a type A personality