The term NOT UP can be represented by four different crossword solutions: ABED (4 letters), SAD (3 letters), DOWN (4 letters), and INBED (5 letters). ABED is an adjective meaning 'lying DOWN' or 'in bed, ' while SAD is an adjective meaning 'UNHAPPY' or 'DEJECTED.' DOWN is an adverb meaning 'in a lower position, ' and INBED is an adverb meaning 'in bed.' ASLEEP is an adjective meaning 'SLEEPING, ' which is the state of being when one is lying DOWN in bed. All of these words are related to the term NOT UP, as they all describe a state of being that is not upright.