1. Relating to laughter or used in eliciting laughter.
2. Eliciting laughter; ludicrous.
3. Capable of laughing or inclined to laugh.
[Late Latin rīsibilis, from Latin rīsus, past participle of rīdēre, to laugh.]
ris′i·bili·ty (-bĭlĭ-tē) n.
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.