sub·sti·tu·tion  (s ŭb ′st ĭ-t sh ən, -ty -)
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n.1. a. The act or process of substituting: the substitution of human workers with robots. b. An instance of this: made several substitutions to the recipe. 2. One that is substituted; a substitute; a replacement: proposed drug therapy as a substitution for surgery.
sub′sti·tution·al, sub′sti·tution·ar′y adj. sub′sti·tution·al·ly adv. |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 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:
Indo-European Roots
Semitic Roots
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.
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