/ree"meuhr/ , n.
1. any of various rotary tools, with helical or straight flutes, for finishing or enlarging holes drilled in metal.
2. any bladelike pick or rod used for scraping, shaping, or enlarging a hole: a pipe reamer.
3. a kitchen utensil for extracting and collecting juice from fruits, having a deep saucerlike base and in the center a grooved cone on which the fruit half is pressed down by hand.
4. Dentistry. a drill with a spiral blade, for enlarging root canals.
[ 1815-25; REAM 2 + -ER 1 ]