Wiktionary
n. a pin badge worn to show fluency in, or a willingness to speak, the Irish language.
Wikipedia
Fáinne (, pl. Fáinní but often "Fáinnes" in English) is the name of a pin badge worn to show fluency in, or a willingness to speak, the Irish Language.
The three modern versions of the pin as relaunched in 2014 by Conradh na Gaeilge are the Fáinne Óir (gold circle), Fáinne Mór Óir (large gold cirle - 9ct) and Fáinne Airgid (silver circle).
In other contexts, fáinne simply means "ring" or "circle" and is also used to give terms such as: fáinne pósta ( wedding ring), fáinne an lae ( daybreak), An Tiarna na fáinní ( The Lord of The Rings), and fáinne cluaise ( earring).
Usage examples of "fainne".
You will not find a better captain to teach you than Captain Fainne, that is for certain.
The monarchy continued, though the Fainne had the ultimate sovereign power at this time.
A fiercely ambitious and unquestionably brilliant man, Edeyrn succeeded in engineering the discrediting and ultimate dissolution of the Fainne, in forcing the monarchy into hiding, and in installing those Druids loyal to him as magical dictators on all levels.
The Theocracy, its military power broken, caved in, and Arthur was named Rex Bejlorum, War-Chief, by the hastily reconstituted Fainne and the newly restored monarch Uthyr.