polysemy(n = noun.attribute) lexical ambiguity - the ambiguity of an individual word or phrase that can be used (in different contexts) to express two or more different meanings; Array
is a kind of ambiguity, equivocalness
Antonym: monosemy
Derived form adjective polysemous₁

polysemy, n. Philol. the existence of many meanings (of a word etc.).

Derivative:
polysemic adj. polysemous adj.

Etymology:
POLY-(1) + Gk sema sign