/gus"it/ , n.
1. a small, triangular piece of material inserted into a shirt, shoe, etc., to improve the fit or for reinforcement. Cf. godet (def. 1), gore 3 (def. 1).
2. Civil Engin. a plate for uniting structural members at a joint, as in a steel frame or truss.
3. Armor.
a. Also called voider . an area of mail backed with cloth, for defending the armpits or areas at joints.
b. a small piece of plate armor at the armhole of a cuirass; pallet.
[ 1375-1425; late ME gousset, deriv. of gousse pod, husk ]