having such a great effect on you that you feel confused and do not know how to react:
an overwhelming sense of guilt
She felt an overwhelming desire to hit him.
She found the city quite overwhelming when she first arrived.
very large or greater, more important etc than any other:
There is overwhelming evidence that smoking damages your health.
An overwhelming majority of the members were against the idea.
The proposal has been given overwhelming support.
The British Air Force succeeded despite overwhelming odds against them.
Congress voted overwhelmingly in favor of the bill.