Of land: Fallow, unploughed.

Of land: not cultivated or worked for agricultural purposes; (sometimes spec.) in which no crop has… In predicative use; esp. in to lie fallow.

Of land: lying fallow. rare.

Not cultivated or worked for agricultural purposes; = fallow, adj.2

Of land: left uncultivated for a period of time; fallow. Cf. rest, v.1 5c.

Of land: fallow, untilled. Cf. restiff, adj. 3. Obsolete. rare.

Of land: that lies fallow during the summer. Also: of or relating to land left fallow in summer.