ˈhighmost,a.Obs. or dial. [f. high a.: see -most.] = highest. 1592Shakes.Rom. & Jul. ii. v. 9 Now is the Sun vpon the highmost hill Of this daies iourney.1688R. Holme Armoury iii. 431/1 The first and highmost is an Instrument called a Spatha.1828Craven Dial., Heighmost, highest.