She was exhausted after clashing with her buddies. I'm becoming exhausted from driving every morning. His wife is exhausted from caring for the children. Your bicycle's brake shoes are wearing out. You'll have to replace them shortly. Worn out means "exhausted due to hard work." This word can also be used to describe someone or something that is no longer fresh and new but rather old and used up. She's worn out from all the walking she does around the school campus. Her music is tired-sounding because it's old music recorded long ago. Your marriage is worn out when there is no more excitement or novelty between you two. Sentence: John is worn out from playing football all day. Worn out can also be an adjective. In this case it means "having been used for a long time": his worn-out car.