noun, British English, informal - used to refer to a woman, often ironically, who is acting as if she were very important or expects to be treated with special respect

noun - a mythological creature that looked like a woman with snakes instead of hair that could turn you into stone if you gazed into her eyes

noun - an official agreement made by a couple before they get married, in which they agree what will happen to their possessions if they get divorced

noun, technical - a picture that shows what something (e.g. a building or a body) would look like if it were cut in half or in certain places

noun - a shop where you can borrow money if you leave there a valuable object as a form of security that you will pay it back

noun - a civillian who is taken prisoner by a criminal who threatens to kill him/her if the government etc. does not do what he wants

noun - a secret word that only you or a limited number of people know, it can be used to e.g. log in to a restricted network, enter a restricted area, access secret information etc.