n. pl. fa·cil·i·ties
a. Ease in moving, acting, or doing: "a soldier who was expected to be able to fell a tree ... or build a bridge with equal facility" (Bruce I. Gudmundsson).
b. An ability or talent; an aptitude: "He was a mediocre student who had a facility for absorbing details without curiosity" (Jhumpa Lahiri).
2. often facilities
a. A building, room, array of equipment, or a number of such things, designed to serve a particular function: hospitals and other health care facilities.
b. Something that facilitates an action or process: The region has very poor transportation facilities.
3. facilities Informal A restroom or public toilet.
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.