* Homonym: This is the most common term for a word that has the same spelling and pronunciation but different meanings. For example, "bat" can refer to a flying mammal or a piece of equipment used in baseball.
* Polysemous word: This refers to a word with multiple meanings, even if those meanings are related. For example, "bright" can mean "shining with light" or "intelligent".
* Homograph: This refers to a word that has the same spelling but different pronunciation and meaning. For example, "read" can be pronounced "red" (past tense) or "reed" (present tense).
* Homophone: This refers to a word that has the same pronunciation but different spelling and meaning. For example, "to" and "too" are homophones.
Ultimately, the best term to use depends on the specific context and the relationship between the different meanings of the word.