co‧op‧e‧ra‧tion S3 W2 also co-operation British English [uncountable]
when you work with someone to achieve something that you both want
political co-operation with Britain
in cooperation with somebody
A study was undertaken in co-operation with oil companies.
Burglar alarm companies claim they work in close co-operation with the police.
the lack of effective co-operation between industry and higher education
the need to strengthen international co-operation
willingness to do what someone asks you to do:
Have your passports ready, and thank you for your cooperation.
Your full cooperation is requested.