n. & v.
n. 1 a a raised edge or border. b a margin or verge, esp. of something circular. 2 the part of a pair of spectacles surrounding the lenses. 3 the outer edge of a wheel, on which the tyre is fitted. 4 a boundary line (the rim of the horizon).
v.tr. (rimmed, rimming) 1 a provide with a rim. b be a rim for or to. 2 edge, border. rim-brake a brake acting on the rim of a wheel. rimless adj. rimmed adj. (also in comb.).
[ OE rima edge: cf. ON rimi ridge (the only known cognate) ]