rim

Multiple Entries:
  rim    RIM  

Concise Oxford English Dictionary © 2008 Oxford University Press:
rim1

▶noun

• 1 the upper or outer edge of something, typically something circular.

  ■ (also wheel rim) the outer edge of a wheel, on which the tyre is fitted.

  ■ the part of a spectacle frame surrounding the lenses.

• 2 a limit or boundary: the outer rim of the solar system.

  ■ an encircling stain or deposit.

▶verb (rims, rimming, rimmed) provide with a rim.

– derivatives
rimless adjective,
-rimmed adjective.

– origin OE rima ‘a border, coast’, rel. to ON rimi ‘ridge, strip of land’.

Concise Oxford English Dictionary © 2008 Oxford University Press:
rim2

▶verb (rims, rimming, rimmed) vulgar slang lick or suck the anus of (a partner) for sexual stimulation.

– origin 1920s: perh. var. of ream2.

Concise Oxford English Dictionary © 2008 Oxford University Press:
RIM

▶abbreviation Mauritania (international vehicle registration).

– origin from Fr. République Islamique de Mauritanie.