1. The act of indicating: His indication of refusal came in the form of a frown.
2. Something that serves to indicate; a sign: indications of an economic recovery.
3. Something indicated as necessary or expedient: Bed rest is usually the indication for flu cases.
4. The information indicated by a measuring instrument.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.