1. an open, uncultivated tract of land with a sandy or gravely soil supporting low vegetation (typically coarse grasses and Ericaceae) and occasionally scattered tree growth, particularly pine —note a heath is considerably drier than a moor 2. the vegetation developing on poor, usually acid, sandy, or gravely soils in lowlands and dominated by heathers (Calluna sp. and Erica sp.) This definition last updated 10/27/2008