a playing card that is usually printed with a picture of a jester
an inconspicuous clause in a document or bill that affects its meaning in a way that is not immediately apparent; "when I demanded my money he showed me the joker in the contract"
a person who enjoys telling or playing jokes
a person who does something thoughtless or annoying; "some joker is blocking the driveway"
an informal photograph; usually made with a small hand-held camera; "my snapshots haven't been developed yet"; "he tried to get unposed shots of his friends"
(patent law) a document drawn up by the applicant for a patent of invention that provides an explicit and detailed description of the nature and use of an invention
a detailed description of design criteria for a piece of work