D defs.my
Entry 1 sense Webster, 1913

Reamer

/(-ẽr)/ · Ream·er · IPA /ˈɹi.məɹ/
01 n. One who, or that which, reams; specifically, an instrument with cutting or scraping edges, used, with a twisting motion, for enlarging a ro…
  1. 1.
    One who, or that which, reams; specifically, an instrument with cutting or scraping edges, used, with a twisting motion, for enlarging a round hole, as the bore of a cannon, etc.