to increase the height of; make higher.

to increase the degree or amount of; augment

Cézanne's death heightened the value of his paintings.

to strengthen, deepen, or intensify

to heighten the plot of a story; to heighten one's awareness or appreciation; to heighten one's suffering.

to bring out the important features of, as in a drawing

to heighten a picture with Chinese white.

to become higher.

to increase

The tension heightened as the enemy forces advanced.

to brighten or become more intense.

verb

add to , amplify , augment , boost , build up , elevate , enhance , enlarge , exalt , extend , improve , increase , lift , magnify , make higher , raise , send up , strengthen , aggravate , deepen , redouble , accent , advance , bolster , enrich , expand , intensify