operation
medical
the process of cutting into someone's body to repair or remove a part that is damaged
2
business/organization
a business, company, or organization:
The firm set up its own property development operation.
a microchip manufacturing operation
Nolan and Barnes were both involved in the operation.
3
work/activities
the work or activities done by a business or organization, or the process of doing this work:
Many small businesses fail in the first year of operation.
The Education Business Partnership has been in operation since 1989.
4
actions
a set of planned actions or activities for a particular purpose: The UN rescue operation started shortly after dawn.
5
machine/system
[uncountable]T the way the parts of a machine or system work together, or the process of making a machine or system work:
The aircraft's engine operation was normal.
in operation Protective clothing must be worn when the machine is in operation.
The device has a single button, allowing for easy operation.
Careful checks must be made before the factory commences operation.
The new investment system came into operation in 1999.
6
principle/law/plan etc
[uncountable] the way something such as a principle or law works or has an effect
in operation a clear example of the law of gravity in operation
come/go into operation (=begin to have an effect)
The new rule comes into operation on February 1.
put/bring something into operation (=make something start to work)
A scheme is being brought into operation to see how these changes would work.
7
military/police action
[countable]PMSCP a planned military or police action, especially one that involves a lot of people:
Britain will carry out a joint military operation with the US.
8TD
computers
[countable]TD an action done by a computer