~ 1
■ noun
1》 the upper or outer edge of something, typically something circular.
↘(also wheel ~ ) 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 ~ of the solar system.
↘an encircling stain or deposit.
■ verb ( ~s , ~ming , ~med ) provide with a ~.
Derivatives
~less adjective
-~med adjective
Origin
OE ~a 'a border, coast', related to ON ~i 'ridge, strip of land'.
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~ 2
■ verb ( ~s , ~ming , ~med ) vulgar slang lick or suck the anus of (a partner) for sexual stimulation.
Origin
1920s: perh. var. of ream 2 .