1. Of or expressing a consensus: a consensual decision.
a. Law Existing or entered into by mutual consent without formalization by document or ceremony: a consensual marriage; a consensual contract.
b. Involving the willing participation of both or all parties, especially in an illegal transaction or practice: the consensual crimes of prostitution, drug abuse, and illegal gambling.
a. Of or relating to a reflexive response of one body structure following stimulation of another, such as the concurrent constriction of one pupil in response to light shined in the other.
b. Of or relating to involuntary movement of a body part accompanying voluntary movement of another.
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.