This shining adjective can refer to a literal glow of light, or it can be more figurative. Think of “effulgent” as beaming happiness, or a personality that radiates kindness. “Effulgent” is one of those adjectives that can also transform into other parts of speech. “Effulgence” is the noun, referring to a quality of brilliance, and “effulgently” is the adverb, used when something is done in an effulgent manner.