Sign -- a relationship between a signifier and something that is signified.
Signified -- the thing itself.
In film, the signifier and the signified are
almost identical; a kind of "short-circuit" sign.
Connotative meaning -- an idea associated with a word or image in addition to its explict (denotative) meaning.
Example: Orin's good teeth in The Ballad
of Narayama are an index of her healthy condition.
Example: In
The
Ballad of Narayama, the crows are symbols of death.