sentences:  Adults may compete in the Oireachtas in Adult Ceili events, there are usually no solo adult competitions at this level.Additionally, adult ceili teams cannot qualify for the World Championships, though they may compete at the North American Nationals.Adult, in Irish Dance terms, is someone who started Irish Dancing at AGE 18 OR OLDER, or a former dancer who has taken MORE than 5 years off, with no Irish dance competitions or formal training during that time.