Old relationship energy is a term used to describe the feelings of stability, comfort, and security one feels in a long-term romantic relationship. It is most commonly used in the polyamorous community, where old relationship energy can be contrasted with the new relationship energy experienced during a newer relationship. However, any long-term couple regardless of whether or not they practice polyamory, can experience old relationship energy.
Old relationship energy is often shortened to the acronym ORE, especially in online communication. It may also be called mature relationship energy.