G4138 πλήρωμα (plḗrōma)

KJV renderings: which is put in to fill up, piece that filled up, fulfilling, full, fulness
Strong's definition: repletion or completion, i.e. (subjectively) what fills (as contents, supplement, copiousness, multitude), or (objectively) what is filled (as container, performance, period)
Derivation: from G4137 (πληρόω);

From James Strong's public-domain dictionaries (G), JSON edition by OpenScriptures (CC-BY-SA). Every dotted-underline word in the text links here.