noun anything resembling a gusset in a garment.
2. gusset ·noun an abatement or mark of dishonor in a coat of arms, resembling a gusset.
3. gusset ·noun a small piece of chain mail at the openings of the joints beneath the arms.
4. gusset ·noun a small piece of cloth inserted in a garment, for the purpose of strengthening some part or giving it a tapering enlargement.
5. gusset ·noun a kind of bracket, or angular piece of iron, fastened in the angles of a structure to give strength or stiffness; ·esp., the part joining the barrel and the fire box of a locomotive boiler.