Excuss \Ex*cuss"\, v. t. [L. excussus. p. p. of excutere to shake off; ex out, from + quatere to shake. Cf. {Quash}.] 1. To shake off; to discard. [R.] To excuss the notation of a Geity out of their minds. --Bp. Stillingfleet. 2. To inspect; to investigate; to decipher. [R.] To take some pains in excusing some old monuments. --F. Junius (1654). 3. To seize and detain by law, as goods. [Obs.] --Ayliffe.