† aˌppendiˈcationObs.rare. [n. of action f.prec.: see -tion.] Addition by way of appendix. 1677Hale Prim.Orig.Man. 74 Some great and considerable parts..appendications unto the Mundus aspectabilis.a1677― Relig. i. 9 Superadditions and Appendications to Christian Religion.