What is "homonymy"

Homonymy \Ho*mon"y*my\, n. [Gr. ?: cf. F. homonymie.]

1. Sameness of name or designation; identity in relations.
   --Holland.

   Homonymy may be as well in place as in persons.
   --Fuller.

2. Sameness of name or designation of things or persons which are different; ambiguity.

n. (context semantics English) The property of being a homonym.