labor union
US /ˈleɪbər ˌjuːniən/
UK /ˈleɪbər ˌjuːniən/

1.
sindicato
an organized association of workers formed to protect and further their rights and interests; a trade union.
:
•
The workers decided to form a labor union to negotiate for better wages.
Os trabalhadores decidiram formar um sindicato para negociar melhores salários.
•
Membership in a labor union can provide job security and benefits.
A filiação a um sindicato pode proporcionar segurança no emprego e benefícios.