The term 'defeated incumbent' refers to a politician who has lost an election and is no longer in office. The two crossword solutions for this term are 'LAME' (4 letters) and 'lameduck' (8 letters). The term 'LAME' is often used to describe someone or something that is weak, ineffective, or inadequate. The term 'lameduck' is a metaphor for a politician who is nearing the end of their term and is no longer able to make significant changes. Both terms are used to describe a defeated incumbent.