adv. By the proper officer; by virtue of the proper authority; in pursuance of the special powers vested in an officer or office; as, accounts or reports officially verified or rendered; letters officially communicated; persons officially notified. [ 1913 Webster ]
[阿拉伯国家联盟 / 阿拉伯國家聯盟, Ā lā bó Guó jiā Lián méngㄚ ㄌㄚ ㄅㄛˊ ㄍㄨㄛˊ ㄐㄧㄚ ㄌㄧㄢˊ ㄇㄥˊ] Arab League, regional organization of Arab states in Southwest Asia, and North and Northeast Africa, officially called the League of Arab States#69872