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The Collaborative International Dictionary of English v.0.48 (gcide)

Scraper \Scrap"er\, n.
1. An instrument with which anything is scraped.
Specifically:
(a) An instrument by which the soles of shoes are cleaned
from mud and the like, by drawing them across it.
(b) An instrument drawn by oxen or horses, used for
scraping up earth in making or repairing roads,
digging cellars, canals etc.
(c) (Naut.) An instrument having two or three sharp sides
or edges, for cleaning the planks, masts, or decks of
a ship.
(d) (Lithography) In the printing press, a board, or
blade, the edge of which is made to rub over the
tympan sheet and thus produce the impression.
[1913 Webster]

2. One who scrapes. Specifically:
(a) One who plays awkwardly on a violin.
(b) One who acquires avariciously and saves penuriously.
[1913 Webster]