1. The kinship relation between a male offspring and the siblings
   "The brotherhood between the twins was unbreakable"
    
2. People engaged in a particular occupation
   "the medical brotherhood";
   - fraternity, sodality
    
3. The feeling that men should treat one another like brothers
   "The organization promoted a sense of brotherhood among its members"
    
4. An organization of employees formed to bargain with the employer
   "you have to join the brotherhood in order to get a job";
   - union, labor union [US], trade union, trades union, labour union [Brit, Cdn]

Derived forms: brotherhoods

Type of: class, family relationship, friendliness, kinship, org [informal], organisation [Brit], organization, relationship, social class, socio-economic class, stratum

Part of: labor [US], labor movement [US, Austral], labour [Brit, Cdn], labour movement [Brit, Cdn], trade union movement

Encyclopedia: Brotherhood, Peter