ring

The dearest ring in Venice will I give you.

a ring of mushrooms growing in the wood

onion rings

Individuals looking to add their own homepage to a particular ring are, however, more or less at the mercy of the ringmaster, who often maintains a ring homepage listing its acceptance (or membership) policies and an index of its member sites.

a crime ring; a prostitution ring; a bidding ring (at an auction sale)

a benzene ring

The ring is common in the Huntingdonshire accounts of Ramsey Abbey. It was equal to half a quarter, i.e., is identical with the coomb of the eastern counties

Kernel Mode processes run in ring 0, and User Mode processes run in ring 3.