a building or place that provides a particular service or is used for a particular industry
"the assembly plant is an enormous facility"
skillful performance or ability without difficulty
"his quick adeptness was a product of good design"
"he was famous for his facility as an archer"
something designed and created to serve a particular function and to afford a particular convenience or service
"catering facilities"
"toilet facilities"
"educational facilities"
a service that an organization or a piece of equipment offers you
"a cell phone with internet facility"
The fact of being easy, or easily done; absence of difficulty, simplicity.
"The facility with which he solved the complex math problem amazed everyone in the class."
In plain English: A facility is a building or place designed for a specific purpose, like a gym or a hospital.
"The new sports facility includes a large swimming pool and gymnasium."
Usage: Use "facility" to describe natural aptitude or ease in performing a skill, such as having facility with languages. It refers to the quality of doing something effortlessly rather than referring to a physical building or place.
The word facility entered English via the Middle French facilité, which itself came from the Latin facilitās. While it is a doublet of "faculty," both terms ultimately stem from the same Latin root meaning ease or capability.