Definition - The state of having many meanings.

Example -
The OED has 30 different definitions for the noun sign.

Etymology -
The term derives from the Greek poly, many + sema, sign.

Oxford English Dictionary -
Its first citation is from 1884:
"What Dante himself, in his dedication to Can Grande, calls the ‘polysemous’ character of the poem.…"
(Athenæum 17 May 628/2)

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