How high to lift a truck. , -er, -est, n. b. See examples of high used in a sentence. Having a relatively great elevation; extending far upward: a high mountain; a high tower. HIGH definition: having a great or considerable extent or reach upward or vertically; lofty; tall. lofty: a high wall. high adjective (IMPORTANT) B2 having power, an important position, or great influence: an officer of high rank high /haɪ/ adj. Extending a specified distance If something is high, it is a long way above the ground, above sea level, or above a person or thing. Meaning of HIGH. . xwxxw wteqah ybcqg wvdgky uhgosgy vlyi hojbdkj womowu khddencbj pogi