Rejection

This article should be split into multiple articles accessible from a disambiguation page.

• In psychology, rejection is an emotion felt by most humans (and possibly other higher animals) when another person denies a personal request, particularly if it is an emotional advance. Repeated rejection (particularly of children) or fear of it, can lead to loneliness and depression.

• In medicine, transplant rejection usually refers to the immune reaction of a host organism to a foreign biological tissue, such as in a transplantation.

• In telecommunications, rejection is the receiving of the desired signal without interference from another undesired one. See selectivity and adjacent-channel rejection.