Inflammation is defined as the swelling or pain that comes from an injury or illness.
An example of inflammation is a swollen joint from rheumatoid arthritis.
inflammation definition by Webster's New World
the act of inflaming
the state of being inflamed; specif., a condition of some part of the body that is a reaction to injury, infection, irritation, etc., and is characterized by varied combinations of redness, pain, heat, swelling, and loss of function
The reaction of a part of the body to injury or infection, characterized by swelling, heat, redness, and pain. The process includes increased blood flow with an influx of white blood cells and other chemical substances that facilitate healing.