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

Time Traveler
The first known use of type A was in 1970

Dictionary Entries Near type A

Cite this Entry

“Type A.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/type%20A. Accessed 25 May. 2024.

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
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