1. turn from an upright or normal position
e.g. The big vase overturned
The canoe tumped over
Synonym: overturnturn overtump over
2. cause to overturn from an upright or normal position
e.g. The cat knocked over the flower vase
the clumsy customer turned over the vase
he tumped over his beer
Synonym: overturnturn overupsetknock overbowl overtump over