Solid
Part of speech: noun
Definition: 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). A three-dimensional figure (as opposed to a surface, an area, or a curve). A favor: a helpful deed. An article of clothing which is of a single color throughout. Food which is not liquid-based.
Part of speech: adverb
Definition: Without spaces or hyphens.
Part of speech: adjective
Definition: In the solid state; not fluid. Large, massive. Filling. Lacking holes or hollows; as solid gold, solid chocolate. Strong or unyielding; as a solid foundation. Lacking errors or inconsistencies. Written as one word, without spaces or hyphens. Excellent, especially musically. Being of a single color throughout.
Example sentence: The mineral world is a much more supple and mobile world than could be imagined by the science of the ancients. Vaguely analogous to the metamorphoses of living creatures, there occurs in the most solid rocks, as we now know, perpetual transformation of a mineral species.
Serious
Part of speech: adjective
Definition: Without humor or expression of happiness; grave in manner or disposition; earnest; thoughtful; solemn.Important; weighty; not trifling; leaving no room for play; needing great attention; critical.Really intending what is said; being in earnest; not jesting or deceiving; meaningful.
Example sentence: Life does not cease to be funny when people die any more than it ceases to be serious when people laugh.