Service

(1) En ydelse, tjeneste eller hjælp, som en forretning eller institution foretager sig overfor sine kunder eller klienter - gratis eller mod betaling.
(2) Et erhverv, der sælger tjenesteydelser (ikke-fysiske varer), herunder transport, rådgivning, rengøring, oplevelser (biograf, zoologisk have, svømmehal mv.).

Grönroos: “[...] a process that consists of a set of activities which take place in interactions between a customer and people, goods and other physical resources, systems and/or infrastructures representing the service provider and possibly involving other customers, which aims at assisting the customer’s everyday practices.”