v. tit·il·lat·ed, tit·il·lat·ing, tit·il·lates
1. To stimulate by touching lightly; tickle.
2. To excite (another) pleasurably, superficially or erotically.
To excite another, especially in a superficial, pleasurable manner: "a steamy story of sex and violence, adultery and murder, designed to titillate as well as to shock" (John Guy).
[Latin tītillāre, tītillāt-, to tickle.]
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.