- to fill too full, so as to cause overflowing.
- to become too full.
Origin of overfill
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for overfill
The Japanese basha has two benches running lengthwise at the sides; three persons fill a bench, four overfill one.Korean Buddhism
The construction makes it impossible to overfill the battery, provided that the finger is held on the vent hole as directed.
Several devices have been developed to make it impossible to overfill batteries.