(1):
(n.) A state of privacy; secrecy.
(2):
(n.) The absence of light; blackness; obscurity; gloom.
(3):
(n.) A state of ignorance or error, especially on moral or religious subjects; hence, wickedness; impurity.
(4):
(n.) Want of clearness or perspicuity; obscurity; as, the darkness of a subject, or of a discussion.
(5):
(n.) A state of distress or trouble.