: something that supplies what is needed or adds to something else <a food supplement>
Word Root of SUPPLEMENT
The Latin word plēre, meaning “to fill,” gives us the root ple. Words from the Latin plēre have something to do with filling or being full. Anything replete with something is full of that particular thing or quality. Something complete is totally full and finished. To deplete is to lessen the amount of something that was once full. A supplement is something that fills in something that is missing.
Definition of SUPPLEMENT for Kids
: to add to :complete<Many workers supplement their incomes by doing odd jobs.>