long cracks in the surface of the earth
The denotative meaning of a word or phrase is the dictionary definition. The dictionary defines fault lines as long cracks in the surface of the earth. They usually occur along the edge of the earth's plates. The connotative meaning of a word is it's inferred meaning. Many times it is created through metaphorical or symbolic meaning. The rest of the definitions are all connotative and help to convey the idea that there is a defining line or major disconnect between things.