1) Dark or deep when used of colour, in contrast to ‘light’.
1415 j lectum de worsted de light blewe et sadde blewe, Wollaton
1451 Item iiij pecić de light blew and sade blew operatć, York
1454 unam togam de sadgrene, Whitkirk
c.1504 Item vij yerdes of sad tawne iiijs, York
1682 one sad colerd peticote, Brayton
1722 a sad brown Bay Gelding, Leeds. It could mean compact or dense: 1691 I ... found the snow deep where drifted but sad and bearing, Slaithwaite. The meaning is likely to be pejorative in the following by-name: 1305-6 Nicholao Saddebely pro uno termino ijs, Bolton Priory. Employed at the same time was Symon Paunch.