Yellow  —adj. 1 of the colour of buttercups, lemons, egg-yolks, etc. 2 having a yellow skin or complexion. 3 colloq. Cowardly. —n. 1 yellow colour or pigment. 2 yellow clothes or material. —v. Turn yellow.  yellowish adj. Yellowness n. Yellowy adj. [old english: related to *gold]