[f. TILL sb.2 + -Y.] Abounding in, or of the nature of, till or tenacious clay.
1799. J. Robertson, Agric. Perth, 14. Houses composed of this mortar or tilly clay.
1812. Sir J. Sinclair, Syst. Husb. Scot., I. 227. Stiff stubborn tilly land.
1844. Stephens, Bk. Farm, I. 169. Clay, and tilly clay even more than the unctuous, retains a great deal of water.
