1. In agreement; compatible: The testimony was consistent with the known facts.
2. Being in agreement with itself; coherent and uniform: a consistent pattern of behavior.
3. Reliable; steady: demonstrated a consistent ability to impress the critics.
4. Mathematics Having at least one common solution, as of two or more equations or inequalities.
5. Holding true as a group; not contradictory: a consistent set of statements.
[Latin cōnsistēns, cōnsistent-, present participle of cōnsistere, to stand still; see CONSIST.]
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:
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.