Definition from Wiktionary, the free dictionary
slade (plural slades)
- (now rare or dialectal) A valley, a flat grassy area, a glade.
- (obsolete) The sole of a plough.
1945 January 29, “Pattern Prays”, in Time Magazine:
- The Bishop, wearing a gleaming cape of green and gold, raised his hand over the plough and the kneeling farmers: "God speed the plough: the beam and the mouldboard, the slade and the sidecap, the share and the coulters […] in fair weather and foul, in success and disappointment, in rain and wind, or in frost and sunshine. God speed the plough."