outing
Synonym discussion
Sense: noun/1
For the first sense, outing is a friendly word for a short shared trip, often planned by a family, school, club, or workplace. Trip is much broader and can mean anything from a quick drive to a long holiday. Excursion is more formal and is common in school, travel, or tour contexts, especially when the visit has a purpose such as learning or sightseeing. Day trip is narrower because it clearly means leaving and returning on the same day. Use outing when the event itself matters as a group activity: The team enjoyed a beach outing. Use day trip when the timing matters: We took a day trip to Taichung and came home that night.
Etymology
This word was formed in English from out with the ending -ing. The older travel sense grew from the idea of going out for a short time, especially for pleasure. The later sense about revealing someone's sexual identity developed much more recently from the verb out, meaning to make that private fact public.