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. Synonyms for HIGHEST: higher, top, upper, first, loftiest, topmost, uppermost, upmost; Antonyms of HIGHEST: lowest, lower, lowermost, under, underneath, below, bottommost, low 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. Here are the possible solutions for Highest clue. It was last seen in The Daily Telegraph quick crossword. We have 10 possible answers in our database. Hopefully you found the right answer here. highest - WordReference English dictionary, questions, discussion and forums. All Free. The comprehensive definition of highest. Includes pronunciation, synonyms, etymology, and usage examples to help you master this word.