 If the two meanings are unrelated, as in the word "pen" meaning both "writing instrument" and "enclosure", they are considered homonyms.Within logical polysemies, a large class of mappings may be considered to be a case of metonymic transfer (e.g., "chicken" for the bird, as well as its meat; "crown" for the object, as well as the institution).Other cases where the meaning is polysemous, however, may turn out to be more metaphorical, e.g., "eye" as in the "eye of the needle".