type A

adjective

Definition of type A

: 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

First Known Use of type A

1970, in the meaning defined above

Learn More About type A

Dictionary Entries Near type A

type 2 diabetes

type A

Type A star

See More Nearby Entries 

Statistics for type A

Cite this Entry

“Type A.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/type%20A. Accessed 2 Oct. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for type A

type A

adjective

Medical Definition of type A

 (Entry 1 of 2)

: 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

noun

Medical Definition of type A (Entry 2 of 2)

: an individual with a type A personality

WORD OF THE DAY

Test Your Vocabulary

Odd Habits and Quirks

  • image1926873504
  • Which of the following best describes an easily irritated person?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!