• The property of a physical material that does not transmit light. For example, a piece of heavily black-tinted glass has obscurity. "Obscurity" is the opposite of "transparency" or "transparentness", just as the adjectives "obscure" and "transparent" are antonyms. Clear glass has "transparency".
• The property of writing or speech that does not easily make sense. For example, a piece of deep poetry has obscurity. Obscurity is the opposite of "transparency" or "transparentness", just as the adjectives "obscure" and "transparent" are opposites, or antonyms. Writing and speech that is transparent is easy to understand.
• Security through obscurity, a controversial principle in security engineering which attempts to use secrecy to provide security.
• Darkness

See also

• Obscure (disambiguation)