← BackshareGuessmountaintops/ˈmaʊntənˌtɑps/nounThe highest part or peak of a mountain.From the mountaintops, you can see the entire valley spread out below.The climbers finally reached the mountaintops after a long and difficult hike.Snow covers the mountaintops even in the middle of summer.SynonymspeaksummitcrestAntonymsvalley