(a) relationship of brothers 兄弟的关系
*the ties of brotherhood 兄弟间的手足亲情.
(b) comradeship; friendship between brothers 同志关系; 兄弟情谊
*live in peace and brotherhood 和睦友好地生活.
2 [C, Gp] members of an association formed for a particular purpose, eg a religious society or socialist organization 全体志同道合者（如宗教社团或社会主义组织中的）.
a feeling of friendship between people
the spirit of brotherhood
an organization formed for a particular purpose, especially a religious one
the Franciscan brotherhood
[C]old-fashioned a union of workers in a particular trade
the relationship between brothers
1. We should never forget our brotherhood. 我们不要忘记我们的手足情。