The meaning of a dream about knife.
A sharp knife signifies personal strife; a rusty knife means family troubles; a broken knife indicates failure in love; an open switchblade knife or penknife predicts legal troubles, a closed one suggests financial reverses; a dull knife portends hard work with little reward.
To cut yourself with a knife is a warning that you could be embarrassed by a neglected creditor; don’t stretch goodwill too far.
See also Cut and Blade.