[noun] [U]The police have thanked the local community for their cooperation in the search for the missing boy.This documentary was made with the cooperation of British Rail.Could I have a little cooperation in this matter, please?There's very little cooperation between the two countries.The company produces computers in cooperation with a German firm.
COOPERATION
Meaning of COOPERATION in English
Cambridge English vocab. Кембриджский английский словарь. 2012