field trip

WordReference Random House Unabridged Dictionary of American English © 2025

field′ trip′, 

1. a trip by students to gain firsthand knowledge away from the classroom, as to a museum, factory, geological area, or environment of certain plants and animals.
2. a trip by a scholar or researcher to gather data firsthand, as to a geological, archaeological, anthropological, or other site.
• 1955–60

Collins Concise English Dictionary © HarperCollins Publishers::

field trip noun

1. an expedition, as by a group of students or research workers, to study something at first hand