A word or phrase that has multiple meanings.(noun)
Having multiple meanings(adjective)
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Use "polyseme" in a sentence
"It is also worth noting that for the Framers, “government” was an actronym: A polyseme whose original meaning was an activity that acquired the secondary meaning of “those engaged in the activity”, which for “government” would be “officials”."
"There there are polyseme — different related meanings."
"But the really entertaining thing about the turkey is that it is some kind of champion polyseme."