adjective

of great vertical extent.

the top of a high mountain

tall,lofty,towering,soaring,elevated,giant,big,multistorey,high-rise,sky-scraping

noun

a high point, level, or figure.

commodity prices were at a rare high

high level,high point,record level,peak,record,high water mark,top,pinnacle,zenith,apex,acme,apogee,apotheosis,culmination,climax,height,summit

adverb

at or to a considerable or specified height.

the sculpture stood about five feet high

at great height,high up,far up,way up,at altitude,in the air,in the sky,on high,aloft,overhead,above one’s head,over one’s head