(astronomy) Any secondary body in the Solar system that is geologically differentiated or in hydrostatic equilibrium and thus has a planet-like geology: a planet, dwarf planet, or the larger moons ...

plural of subject clause

(transitive) To put a border on something. / (transitive) To form a border around; to bound. / (transitive) To lie on, or adjacent to, a border of.

(rare) Synonym of Welsh, the language of the Welsh people.