A more thorough explanation:

Definition: A tortfeasor is someone who commits a tort.

Explanation: A tort is a wrongful act that causes harm or injury to another person. A tortfeasor is the person who commits this wrongful act. For example, if someone causes a car accident by running a red light, they are the tortfeasor because they committed the tort of negligence.

Example: A doctor who performs surgery on the wrong body part is a tortfeasor because they committed the tort of medical malpractice. Another example is a business owner who fails to clean up a spill in their store, causing a customer to slip and fall. The business owner is the tortfeasor because they committed the tort of premises liability.