Lewis & Short

ē-vanno, ĕre, v. a. [vannus], to cast out the chaff of grain from the fan, to winnow.

  1. * I. Lit.: acus, Varr. R. R. 1, 52 fin.
  2. * II. Transf., to cast out: aliquem, Pompon. ap. Non. 19, 23 (Rib. Com. Fragm. p. 239).