1. a short journey or trip, especially one taken for pleasure or education
2. a brief departure from a main route, course, or subject

Examples

• The school organized an excursion to the natural history museum.
• We took a day excursion to the nearby mountains.
• The boat excursion around the harbor was very relaxing.
• His speech included a brief excursion into ancient history.
• The hiking excursion lasted about four hours.
• Students enjoyed the educational excursion to the science center.
• The professor made an excursion from his main topic to explain a key concept.