Definition from Wiktionary, the free dictionary
paperweight (plural paperweights)
- A small, decorative, somewhat weighty (and now, highly collectable) object placed on one or more pieces of paper to keep them from fluttering away.
- Any object for this purpose.
- John used his coffee mug as a paperweight.
- (slang) An otherwise useless piece of equipment.
small, decorative, somewhat weighty object
any object for this purpose
slang: useless object