a. Obs. [f. COST sb.2 + -Y.] = COSTLY.
c. 1380. Wyclif, Sel. Wks., III. 312. More costy and profitable. Ibid., Wks. (1880), 194. Costy bokis. Ibid., 210. Costy festis.
1483. Cath. Angl., 77. Costy, sumptuosus.
