Rectal refers to anything related to or occurring within the rectum, which is the last part of the large intestine before the anus. It can be used in a medical context to describe conditions affecting the rectum or treatments administered through the rectum, such as enemas or suppositories. The term "rectal" may also be used more broadly to refer to anything related to the rear end of something or someone, for example, "the car's rectal area was damaged in the accident."