o‧ver‧run1 past tense overran past participle overrun, present participle overrunning
1 [transitive usually passive]
if unwanted things or people overrun a place, they spread over it in great numbers
be overrun by/with something
a tiny island overrun by tourists
The house was overrun with mice.
2 [intransitive and transitive]
to take more time or money than intended:
The final speaker overran by at least half an hour.
3 [transitive usually passive]
if soldiers overrun a place, they take control of it:
Poland was overrun by the Russian army.