Yosemite National Park Syllabification: (Yo·sem·i·te Na·tion·al Park)Pronunciation: /yōˈsemətē/Definition of Yosemite National Park a national park in the Sierra Nevada, in central California. It includes Yosemite Valley, with its sheer granite cliffs, and Yosemite Falls, the highest waterfall in the US. Yosemite National Park in other Oxford dictionaries Definition of Yosemite National Park in the British & World English dictionary