Psoriasis: The most common skin disorder that also affects the joints, including the knees, is psoriasis. Although certainly not all patients with psoriasis will develop joint problems, psoriatic arthritis may cause knee pain and swelling. ...Read more.
Definition of accident. 1  1a : an unforeseen and unplanned event or circumstance Their meeting was an accident.b : lack of intention or necessity : chance They met by accident rather than by design.
Confidence votes 58.8K. There is no universally agreed upon definition of accident in the field of occupational safety and health, and many professionals prefer not to use the word at all because it implies something that was not preventable (act of God, accidents will happen).