1.NounAn honour whereby one is made into a knight, and whereafter one is entitled to be called Sir.
"the knighthood of Sir [So-and-So]; He's got an OBE and MBE, and his recent work should entitle him to a knighthood.; They rushed to congratulate Sir John Smith on his knighthood."
2.NounThe quality of being a knight.
3.NounThe knights collectively, the body of knights.