a metaphor that has occurred so often that it has become a new meaning of the expression (e.g., `he is a snake' may once have been a metaphor but after years of use it has died and become a new sense of the word `snake')
a metaphor that has occurred so often that it has become a new meaning of the expression (e.g., `he is a snake'' may once have been a metaphor but after years of use it has died and become a new sense of the word `snake'')
