(mathematical analysis, measure theory) A family of sets that is closed under finite unions and differences.

A surname originating as an occupation for a maker of rings as jewelry or as in harness. / A parish of County Waterford, Ireland.

The sound of something that rings. / The quality of being resonant.

Loud and clear. / Made forcefully; powerful.

present participle of ring

Marked with rings, circles, or loops. / (literary, archaic) Wearing a wedding ring; hence, lawfully wedded.

simple past tense and past participle of ring (circled, enclosed)

To make a phone call to (this place). / (transitive) To celebrate by ringing of bells or as if by ringing of the bells.

(transitive) To encircle, to surround in a ring, engirdle.

present participle of ring in