(noun) a playing card that is usually printed with a picture of a jester
(noun) 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”
(noun) a person who enjoys telling or playing jokes
(noun) a person who does something thoughtless or annoying; “some joker is blocking the driveway”
Source: WordNet® 3.1
A fictional villain of DC Comics, noted for his insanity and cunning, who either wears clown makeup or is disfigured to appear as such, and who is archenemy of Batman.
joker (plural jokers)
A person who makes jokes.
(slang) A funny person.
Synonyms: court jester, fool, jester
A playing card that features a picture of a joker (that is, a jester) and that may be used as a wild card in some card games.
An unspecified, vaguely disreputable person.
(New Zealand, colloquial) A man.
A clause in a contract that undermines its apparent provisions.
1. One who makes jokes or jests.
2. (Card Playing)
Definition: See Rest bower, under 2d Bower.
Source: Webster’s Unabridged Dictionary 1913 Edition