adjective

• (obsolete or poetic) Overtaken by night; especially of a traveller, etc.: caught out by oncoming night before reaching one's destination.
• (obsolete) Plunged into darkness.
• (figuratively) Lacking education or knowledge; unenlightened; also, lacking morality; immoral, unscrupulous.
• (figuratively, obsolete) Difficult to understand; abstruse, obscure.