Homonym

A homonym is a word that has more than one meaning. For example, right means moral, the opposite of left, and a personal freedom.

Definition: one of a group of words that share the same spelling and/or pronunciation but have different meanings.^[1]

The point is that homonyms are either homophones (they sound the same) or homographs (they look the same) or both.

1. ↑ homonym, Random House unabridged dictionary at dictionary.com