paperweight

English

paper +‎ weight

paperweight (plural paperweights)

A small, decorative, somewhat weighty object placed on one or more pieces of paper to keep them from fluttering away.
- 2013 September-October, Henry Petroski, “The Evolution of Eyeglasses”, in American Scientist:
  The ability of a segment of a glass sphere to magnify whatever is placed before it was known around the year 1000, when the spherical segment was called a reading stone, essentially what today we might term a frameless magnifying glass or plain glass paperweight.
Any object used for this purpose.
John used his coffee mug as a paperweight.
(slang) A useless piece of equipment.

small, decorative, somewhat weighty object

Belarusian: прэс-пап'е́ n (pres-papʺjé)
Bulgarian: преспапие́ n (prespapié)
Catalan: petjapapers m
Chinese:
Mandarin: 鎮紙 (zh), 镇纸 (zh) (zhènzhǐ), 紙鎮, 纸镇 (zhǐzhèn), 書鎮 (zh), 书镇 (zh) (shūzhèn), 紙壓 (zh), 纸压 (zh) (zhǐyā)
Czech: těžítko (cs) n
Dutch: presse-papier (nl)
Finnish: paperipaino
French: presse-papiers (fr) m, presse-papier (fr) m
Galician: calcapapeis m
German: Briefbeschwerer (de) m
Greek: πρες παπιέ n (pres papié)
Hungarian: papírnehezék
Irish: tromán páipéir m
Italian: fermacarte (it) m
Japanese: 文鎮 (ぶんちん, bunchin), 卦算 (けいさん, keisan)
Korean: 문진 (ko) (munjin)
Norman: paids à papi m
Norwegian:
Bokmål: brevpresse, papirvekt m or f
Nynorsk: papirvekt f
Polish: przycisk do papieru m
Portuguese: pisa-papéis m (Portugal), peso de papel m (Brazil)
Romanian: prespapier (ro) n
Russian: пресс-папье́ (ru) n (press-papʹjé)
Slovak: ťažítko n
Slovene: obtežilnik m
Spanish: pisapapeles (es) m
Swedish: brevpress (sv)
Turkish: prespapye
Ukrainian: прес-пап'є́ n (pres-papʺjé)
Vietnamese: bàn thẩm, chặn giấy

any object used for this purpose

slang: useless object