highest - WordReference English dictionary, questions, discussion and forums. All Free. Synonyms for HIGHEST: higher, top, upper, first, loftiest, topmost, uppermost, upmost; Antonyms of HIGHEST: lowest, lower, lowermost, under, underneath, below, bottommost, low The comprehensive definition of highest. Includes pronunciation, synonyms, etymology, and usage examples to help you master this word. Mauna Kea (4,207 m (13,802 ft) above sea level) is the world 's tallest mountain and volcano, rising about 10,203 m (33,474 ft) from the Pacific Ocean floor. Adjective highest superlative form of high: most high Synonyms: maximum, ultimate, utmost; see also Thesaurus: extreme top note - The highest in a piece of music or in a singer's vocal range. paramount, tantamount - Paramount means primary, top, and tantamount means equivalent to, same as ; paramount first meant highest in jurisdiction. The meaning of HIGH is rising or extending upward a great distance or a distance greater than others of its kind : taller than average, usual, or expected. How to use high in a sentence. Synonym Discussion of High. HIGHEST definition: superlative of high. and a word form of high. See examples of highest used in a sentence. Find 49 different ways to say HIGHEST, along with antonyms, related words, and example sentences at Thesaurus.com. The summit of Mount Elbert is the highest point of the U.S. State of Colorado, the Rocky Mountains of North America, and the entire Mississippi River drainage basin.