geocachingEtymologyFrom geo- + caching. First attested in 2000. See additional etymology at geocache.nounA pastime in which participants use a GPS receiver to find a hidden container at a specific latitude and longitude, or to hide a container to be found in this manner.“In addition to the uses cited, a sport called geocaching — a high-tech version of hide and seek or orienteering — has evolved that uses GPS to locate points of interest and hidden items, or caches.”