If the laceration affects or passes through our skin, it will cause a visible opening in your skin’s surface. But if the laceration is internal only, like a torn muscle, you may have different symptoms, like bruising or swelling. Looking for online definition of laceration in the Medical Dictionary? laceration explanation free. What is laceration? Meaning of laceration medical term. What does laceration mean? A laceration is an irregular cut in the skin caused by a sharp object. Learn how to treat a laceration at home and when to seek medical care. Learn about cuts or lacerations, skin wounds with separation of the connective tissue elements. Find out how to diagnose, treat, prevent, and care for cuts or lacerations at home or in the hospital.