Definition of "piggybacking" [piggybacking]

• Present participle of piggyback. (verb)

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• "This represents a theme that we played very successfully over the years that we call "piggybacking on activism.""
• "The HD in HD Radio doesn't stand for "high definition" -- it is a brand name piggybacking on the popularity of HD TV."
• "Lastly, here's a thought I had about category integration across blogs: "tag piggybacking"."