1. The consort or widow of a duke; also a lady who has the sovereignty of a duchy.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• diches,
• tuches,
• dicuess,
• purchess,
• dicess,
• suchess,
• duches,
• decuess,
• ducher,
• duche,
• duchs,
• dushes,
• duscess,
• ducuss,
• duchass,
• xuchess,
• cuchess,
• fuchess,
• ruchess,
• euchess

• DUKES,
• chess,
• ducasse,
• dyches,
• touches.

The adjective form of the word "duchess" is "ducal".

The plural of the "duchess" can be the "duchesses".

The singular of the "duchess" can be the "duchess".