Longman Dictionary of Contemporary English homepage

exclusion

 noun
     
ex‧clu‧sion
1 [uncountable and countable] when someone is not allowed to take part in something or enter a place [≠ inclusion]
exclusion from
the country's exclusion from the United Nations
2 [uncountable and countable] British English when a child is officially made to leave their school because of their bad behaviour
3

do something to the exclusion of something

to do something so much that you do not do, include, or have time for other things:
Your essays tend to concentrate on one theme to the exclusion of everything else.
4 [countable] something that is excluded from a contract [≠ inclusion]:
You will be sent full details of the exclusions of your insurance policy.
—exclusionary adjective:
exclusionary business practices
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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