TRANSPA'RENCY, noun [See Transparent.] That state or property of a body by which it suffers rays of light to pass through it, so that objects can be distinctly seen through it; diaphaneity. This is a property of glass, water and air, which when clear, admit the free passage of light. transparency is opposed to opakeness.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI