faculty-n; 4 Senses

Sense Number 1: an innate ability, mental or physical

Commentary: FACULTY[+quality][+ability][+innate][+physical/+mental]

The author has possesses a great faculty for philosophical analysis.
Her grandmother's mental faculties have not diminished with age.
John has a faculty for saying the wrong thing at the wrong time.
The faculty of smell is much more developed in dogs than in humans.

WordNet 3.0 Sense Numbers: 1

Sense Number 2: professors in an academic institution

Commentary: FACULTY[+entity][+social][+group][+people][+teacher][+school][+university/+high_school]
NOTE: refers to -people-, not to institutions (see Sense 3)

He's on the faculty at Princeton.
There were few tenured women on the faculty during that era.
Many of the faculty and students have signed the petition.

WordNet 3.0 Sense Numbers: 2

Sense Number 3: a branch of a university

Commentary: FACULTY[+entity][+social][+institution][+educational][+department][+academic]
NOTE: refers to a department, part of an academic institution, -not- the teachers (see Sense 2)
NOTE: almost always of the form 'faculty of X' where X is an institution.

John is the dean of the faculty of arts and sciences at a major university.
Mary received her diploma from the faculty of engineering.

WordNet 0.0 Sense Numbers: 2b

Sense Number 4: power or authority that is conferred

Commentary: FACULTY[+state][+authority][+conferred]
NOTE: often refers to an authorization given by a religious group.

The church granted him the faculty to perform an exorcism on the child.
They stripped him of the faculty to perform mass.

WordNet 0.0 Sense Numbers: 4