breechesPronunciation: /ˈbrɪtʃɪz, briːtʃɪz/Translate breeches | into German | into Spanish Definition of breeches noun short trousers fastened just below the knee, now chiefly worn for riding or as part of ceremonial dress: a pair of buckskin breeches informal trousers. Origin: Middle English: plural of breechbreeches in other Oxford dictionaries Definition of breeches in the US English dictionary