1. lack of success in doing or achieving something
2. a person or thing that does not succeed
3. the action of not doing something, especially something that you should do

Examples

• The project ended in complete failure.
• She felt like a failure after losing her job.
• His failure to attend the meeting caused problems.
• The engine failure forced the plane to make an emergency landing.
• Despite several failures, she never gave up trying.
• The failure of the peace talks disappointed everyone.
• The movie was a commercial failure but won critical acclaim.