To make very angry or impatient; annoy greatly.
To increase the gravity or intensity of: "a scene . . . that exasperates his rose fever and makes him sneeze” ( Samuel Beckett).
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.