Longman Dictionary of Contemporary English homepage

department

noun
     
Related topics: Organizations
de‧part‧ment S3 W1 [countable]
1SSO one of the groups of people who work together in a particular part of a large organization such as a hospital, university, company, or government:
the personnel department
the English department
department of
the Department of the Environment
2 an area in a large shop where a particular type of product is sold:
the toy department
3

be somebody's department

spoken if something is someone's department, they are responsible for it or know a lot about it:
I'll see what I can do, but it's not really my department.
4 spoken a particular part of someone's character, or a particular part of a larger activity or subject:
Dave was lacking in the trustworthiness department.
departmental adjective:
a departmental meeting

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