| 1. | of or pertaining to a pattern of behavior characterized by competitiveness, a sense of urgency, impatience, perfectionism, and assertiveness, and possibly associated with an increased risk of heart disease. |
| 2. | of or pertaining to a person who exhibits Type A behavior. |
| type A or Type A adj. Of or relating to a behavior pattern marked by tenseness, impatience, and aggressiveness, often resulting in stress-related symptoms such as insomnia and indigestion and possibly increasing the risk of heart disease. n. One who exhibits this behavior pattern. |