polysemantic.

adjective  ·  also a project, forthcoming
  1. 1. having more than one meaning; open to several readings at once, and resisting a single fixed one.
  2. 2. of a single element (a neuron, a word, a mark) that quietly carries many unrelated meanings together.
  3. 3. a project still deciding what it means
Usage

"It was deliberately polysemantic — which was, more or less, the point."