—v.i. 1. to have or suffer a continuous, dull pain: His whole body ached. 2. to feel great sympathy, pity, or the like: Her heart ached for the starving animals. 3. to feel eager; yearn; long: She ached to be the champion. He's just aching to get even.
—n. a continuous, dull pain (in contrast to a sharp, sudden, or sporadic pain).