Fault/fɔːlt/ Definition 1 of 5Pro Tip 1/3Personal Responsibility Used when admitting you're responsible for a negative situation. I admit it's my fault we missed the deadline. Pro Tip 2/3Assigning Blame Indicates who's to blame in a situation, can imply guilt. They all said it was his fault the project failed. Pro Tip 3/3Negative Outcome Usually relates to negative outcomes of actions or decisions. If the event is a disaster, it's your fault.