toptoptopstoppedtopping2adjectivehighest or best: Put this book on the top shelf. She's one of the country's top athletes.toptoptops1noun1the highest part of something: There's a church at the top of the hill.oppositebottom2a cover that you put on something to close it: Where's the top of this jar?3a piece of clothing that you wear on the top part of your body: I like your top – is it new?on topon its highest part: The cake had cream on top.on top of somethingon or over something: A tree fell on top of my car.