v. dem·on·strat·ed, dem·on·strat·ing, dem·on·strates
1. To show clearly and deliberately; manifest: demonstrated her skill as a gymnast; demonstrate affection by hugging.
2. To show to be true by reasoning or adducing evidence; prove: demonstrate a proposition.
3. To present by experiments, examples, or practical application; explain and illustrate: demonstrated the laws of physics with laboratory equipment.
4. To show the use of (an article) to a prospective buyer: The salesperson plugged in and demonstrated the vacuum cleaner.
1. To give a demonstration: described the dance step, then took a partner and demonstrated.
2. To participate in a public display of opinion: demonstrated against tax hikes.
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.