To a producer
it's a property that has box-office value.
To a writer
it's a screenplay.
To a film star
it's a vehicle.
To a director
it's an artistic medium.
To a genre critic
it's a classifiable narrative form.
To a socialogist
it's an index of public sentiment.
To a psychiatrist
it's an instinctive exploration of hidden fears or communal ideals.
To a moviegoer
it can be all of these and more.
~ from Louis Grannatti's "Understanding Movies" text (pp. 372; my line breaks and bold marks)