- blanch [bla:ntʃ US blæntʃ] v[Date: 1300-1400; : Old French; Origin: blanchir, from blanc 'white']1.) [T]to put vegetables, fruit, or nuts into boiling water for a short time▪ Blanch the peaches and remove the skins.2.) [i]literaryto become pale because you are frightened or shocked▪ Patrick visibly blanched.
Dictionary of contemporary English. 2013.