0 the action of touching or making changes to something that you should not, usually when you are trying to damage it or do something illegal:
The medications come in sealed containers to protect against tampering.
Any tampering with the system risks making it less effective.
He was concerned that the way she was investigating the case constituted obstruction of justice or tampering.
1 the illegal act of touching or making changes to something when you should not:
The writer appeals to us to protect nature against human tampering.
The machines could be locked by officials when voting was over, preventing - or at least reducing - tampering.
A subeditor changed the names throughout the piece, and the newspaper later apologized to the author for the tampering.
