Homonymy

Homonymy is the phenomenon that one form has two or more meanings and/or syntactic functions.

Example
The Dutch word bank is homonymous, since it can refer to (a) a couch, and (b) a bank. Equivalent to ambiguity.

The English word right is also homonymous, meaning (a) correct, or (b) the opposite of 'left''.

Link
Utrecht Lexicon of Linguistics