English Etymology From un- + high. Pronunciation Rhymes: -aɪ Adjective unhigh (comparative more unhigh, superlative most unhigh) (rare) Not high; low. 1838 October, Henry Wadsworth Longfellow, transl., “[Translations.] The Grave. […]”, in Voices of the Night, Cambridge, Mass.: […] John Owen, published 1839, →OCLC, page 114:Thy house is notHighly timbered,It is unhigh and low; […]