1. The act of indicating.
2. Something that serves to indicate; a sign.
3. Something indicated as necessary or expedient: Bed rest is usually the indication for flu cases.
4. The degree indicated by a measuring instrument.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.