† vail staffObs.—1 [f. vail v.2 1 b.] The practice of lowering a staff in token of respect or as a salute. 1599Greene George a Greene v. i, And for the ancient custome of Vaile staffe, keepe it still, Clayme priuiledge from me: If any aske a reason why? or how? Say, English Edward vaild his staffe to you.