(chemistry) A substance in the fundamental state of matter that retains its size and shape without need of a container (as opposed to a liquid or gas).

Solidly. / (not comparable, typography) Without spaces or hyphens.

(countable) A bond of unity or agreement between individuals, united around a common goal or against a common enemy, such as the unifying principle that defines the labor movement; mutual support within a group.

(geometry) Any of several nonconvex regular polyhedra with regular pentagrammatic faces or vertex figures and which can be obtained by stellation of the dodecahedron or icosahedron.

(geometry) Any of five convex polyhedra with congruent regular polygonal faces, which have a high degree of symmetry and have been studied since antiquity.

Aloneness; the state of being alone, solitary, or by oneself. / A lonely or deserted place.

(countable) One who lives alone, or in solitude; an anchorite, hermit or recluse. / (uncountable) Solitary confinement. / (uncountable) The state of being solitary; solitude

Living or being by oneself; alone; having no companion present / Performed, passed, or endured alone / Not much visited or frequented; remote from society

(archaic) The Rodrigues solitaire (Pezophaps solitaria), an extinct flightless bird.

(philosophy) The idea that the self is all that exists or that can be proven to exist. / Self-absorption, an unawareness of the views or needs of others; self-centeredness; egoism.