Denotation - Connotation

Google's definitions:

• Denotation: the literal or primary meaning of a word, in contrast to the feelings or ideas that the word suggests.
• Connotation: 
  an idea or feeling which a word invokes for a person in addition to its literal or primary meaning.

The first image connotes a simple kitchen knife, however due to many past famous horror films, we also hold a sense of fear and gory, famous throughout all slasher films and in particular psycho, this is the denotation. A denotation is the surface meaning or what the image or object seems to be, the connotations of this are the deeper meaning is what we automatically associate this thing with.