1. （用橡皮等）擦掉，擦去
If you rub out something that you have written on paper or a board, you remove it using a rubber or eraser.

2. 除掉;杀掉
If one person rubs out another, they kill them.

1. remove by or as if by rubbing or erasing

e.g. Please erase the formula on the blackboard--it is wrong!

Synonym: erasescore outeffacewipe off