companion

A companion is a person or animal that accompanies another individual. Companions are defined by the relationship of proximity or shared activity, and they may offer friendship, support, or practical help. The term is also used for non-human entities that accompany a main object or experience, such as a device or program designed to assist a primary product.

Etymology: The word derives from Old French companon, from Late Latin companionem, from com- meaning together and panis meaning bread. Originally it referred to someone who shares bread, and the sense expanded to mean a person who travels with or is close to another.

Human contexts: In everyday life, companions include friends, partners, or allies who share time and activities. In caregiving, a companion may provide social interaction and non-medical assistance. In travel, work, or entertainment, a companion accompanies another on duties or experiences. In literature and film, a companion character accompanies the protagonist and typically offers loyalty or support.

Companion animals: The term "companion animal" refers to pets kept primarily for companionship rather than work or food. Dogs and cats are common examples, though many species can serve as companions. Companionship from animals can contribute to emotional support and well-being.

Technology: In tech, a companion app or companion device is designed to accompany and extend the functionality of a primary product, such as a wearable, a gaming console, or a home automation system. These tools often provide additional information, control, or customization.

Other uses: In astronomy, a stellar companion is a star bound to another star in a binary or multiple-star system. In horticulture, companion planting uses plants that benefit each other, typically for pest management or pollination.

See also: companionship, sidekick, pet, companion planting, companion animal.