unknown (Adjective) — Not known. ex. "an unknown amount" ex. "an unknown island" ex. "an unknown writer" ex. "an unknown source"
unknown (Adjective) — Being or having a source that is not known or who's name is unknown. ex. "a poem by an unknown author"
unknown (Adjective) — Not known to exist. ex. "things obscurely felt surged up from unknown depths"
unknown (Adjective) — Not famous or acclaimed. ex. "an unknown family"
unknown (Adjective) — Not known before. ex. "don't let anyone unknown into the house"
unknown (Noun) — An unknown and unexplored region. ex. "they came like angels out of the unknown"
unknown (Noun) — Anyone who does not belong in the environment in which they are found.
unknown (Noun) — A variable whose values are solutions of an equation.