1.[countableC, uncountableU]SLA the 21st letter of the English alphabet 英语字母表的第二十一个字母
2.[singular, uncountableU]British EnglishBrE used to describe a film that has been officially approved as suitable for people of any ageU 级〔指经官方审看批准适合各年龄段观众观看的电影〕 → PGSYN American English G