To cut with a knife.
To use a knife to injure or kill by stabbing, slashing, or otherwise using the sharp edge of the knife as a weapon.
To cut through as if with a knife.
To betray, especially in the context of a political slate.
To positively ignore, especially in order to denigrate. compare cut
An instance of stabbing with a knife.
There was a knifing outside that club last night.