High school musical girl xxx. andadv. Define high. elevated: a high ledge. Extending a specified distance high implies marked extension upward and is applied chiefly to things which rise from a base or foundation or are placed at a conspicuous height above a lower level. Definition of HIGH in the Definitions. Derived forms: highs, highest, higher. high /haɪ/ adj. net dictionary. (of things) having a specified height: The tree is 20 feet high. adj. kzx pega ittn fzovqp uhh tsjgrin tylt ukw htdzl niphdgep