Found in the following dictionaries
OTCWL2014 (NASPA Word List 2014)
"Geotag" Definition
noun
An electronic tag that assigns a geographical location to a photograph or video, a posting on a social media website, etc.
Source: Oxford Dictionary
verb
To augment (photographs or other items) with metadata indicating a geographic location.
Source: Wiktionary
Assign a geotag or geotags to (a digital photograph or video, a posting on a social media website, etc.).
Source: Oxford Dictionary
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