Definitions
1.nounAny abrupt and inexplicable transition or occurrence."Having a costumed superhero abduct the vicar was an utter non sequitur in the novel."
2.nounAny invalid argument in which the conclusion cannot be logically deduced from the premises; a logical fallacy.
3.nounA statement that does not logically follow a statement that came before it.
4.noun(humor) A kind of pun that uses a change of word, subject, or meaning to make a joke of the listener’s expectation.