0 a bar attached to the front and back of a car to protect it in an accident -- paraurti
1 bigger or better than usual -- abbondante, generoso
a bumper year un’annata abbondante
2 a bar on a motor vehicle to lessen damage when it collides with anything; fenderAmerican -- paraurti
3 excellent in some way, especially by being large -- eccezionale
We had a bumper crop of strawberries.