- I(Roget's IV) modif.Syn. uppermost, first, leading; see highest .II(Roget's Thesaurus II) adjective 1. Of, being, located at, or forming the top: highest, loftiest, top, upmost, uppermost. See HIGH. 2. Greatest in quantity or highest in degree that has been or can be attained: maximal, maximum, top, ultimate, utmost, uttermost. See HIGH, LIMITED.
English dictionary for students. 2013.