(biblical) The twenty-second book of the Hebrew Bible.

The Sun and all the heavenly bodies that orbit around it, including the eight planets, their moons, the asteroids, and comets.

The state or quality of being solid. / Moral firmness; validity; truth; certainty. / (geometry) The solid contents of a body; volume; amount of enclosed space.

(chiefly US and Canada) A room, rooftop, balcony, or terrace, used for its abundant sunlight (especially) when used as a medical treatment.

(geometry) Any of a class of convex polyhedra that have regular faces but are not uniform (that is, not Platonic solids, Archimedean solids, prisms, or antiprisms).

(geometry) Any of a class of convex semiregular polyhedra, composed of two or more types of regular polygon meeting in identical vertices.

(physics) Any homogenous crystalline solid, consisting of more than one type of molecule or atom randomly dispersed, in which the structure is independent of its composition.

(law) Synonym of attorney-client privilege

Forced isolation in a small space and the denial of contact with other persons, usually as a form of punishment for a prison inmate.

(astronomy) A unit, equal to the mass of the sun, used to express the mass of other stars etc. 1 M_☉ = 2 × 10³⁰ kg.