Factsheet What does the word highest mean? There are eight meanings listed in OED's entry for the word highest. See ‘Meaning & use’ for definitions, usage, and quotation evidence. Adjective highest superlative form of high: most high Synonyms: maximum, ultimate, utmost; see also Thesaurus: extreme HIGHEST definition: superlative of high. and a word form of high. See examples of highest used in a sentence. highest definition: greatest in degree or amount. Check meanings, examples, usage tips, pronunciation, domains, and related words. Discover expressions like highest point , at one's highest , to the highest degree. 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 comprehensive definition of highest. Includes pronunciation, synonyms, etymology, and usage examples to help you master this word. highest - WordReference English dictionary, questions, discussion and forums. All Free. 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. Synonyms for HIGHEST: higher, top, upper, first, loftiest, topmost, uppermost, upmost; Antonyms of HIGHEST: lowest, lower, lowermost, under, underneath, below, bottommost, low 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.