What’s the exact definition of deadstock? Need a clear explanation! or Can someone break down the def

Wow, thanks y’all! This clears up so much. I had no idea deadstock had to be *unused*—thought it was just old stuff in general.

Gonna check my stash again and see if anything fits the definition deadstock. Def gonna peek at Grailed and Depop for examples before listing.

Quick Q tho—does deadstock lose value if the packaging is damaged? Like, if the box is beat but the item’s perfect, does it still count?