ˈknife-ˌplaying †a. Tossing and catching knives, as practised by jugglers. Obs. b. Wielding a knife as a weapon. 13..K. Alis. 1044 (Bodl. MS.) Knijf pleyeyng and syngyng.1855Motley Dutch Rep. vi. i. (1866) 784 ‘We came nearly to knife-playing’, said the most distinguished priest in the assembly.