Used chiefly in computing/archiving to mean “to assign keywords to (a file, image, etc.)”.
Definitions
To tag or label (digital content) with one or more keywords for easier retrieval. Photographers should keyword their images before uploading them to stock libraries.
Attributive use in compounds such as “keyword search”, “keyword advertising”; treated as an adjective.
Definitions
Relating to or serving as a keyword; central or essential. A keyword search will quickly locate the relevant documents.