overfillEtymologyFrom Middle English *overfillen, oferfüllen, from Old English oferfyllan (“to cram, overfill”), equivalent to over- + fill. Cognate with Middle Low German overfullen, German überfüllen, Danish overfylde, Swedish överfylla.overfill means an instance of overfilling. Lexicurio rates it Sui generis — a strength score of 86 out of 100.nounAn instance of overfilling.verbTo fill beyond capacity or beyond what is appropriate.