Impaste Copy link Impaste , transitive verb [Prefix im- in + paste: compare Italian impastare, Old French empaster, French empâter. See 1st In- and Paste.] 1. To knead; to make into paste; to concrete. Blood... baked and impasted. — Shakespeare 2. (Painting) To lay color on canvas by uniting them skillfully together. Compare Impasto. [Rare]