Meaning of “overflow” - Learner’s Dictionary

overflow

verb uk us /ˌəʊvəˈfləʊ/
CONTAINER [ I ]

If a container or a place overflows, the thing that is inside it starts coming out because it is too full:

The bath overflowed, and there's water all over the floor!
The bin was overflowing with rubbish.
CONTENTS [ I, T ]

to come out of a container or a place because it is too full:

The river overflowed its banks after the heavy rainfall.
overflow with confidence/happiness/love, etc

to have a lot of a quality or emotion

overflow uk us /ˈəʊvəfləʊ/ noun [ C, U ]

(Definition of “overflow” from the Cambridge Learner’s Dictionary © Cambridge University Press)