yellownessEnglishOxford Dictionary of Englishyellowness /ˈjɛlə(ʊ)nəs / ▸ noun [mass noun] 1 the quality or condition of being yellow or yellowish: the yellowness of milk depends on the fodder given to the cow the yellowness could be due to a health issue. 2 derogatory the quality or condition of being cowardly; cowardice.