Englishfor English speakers
regulation
Noun
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A regulation is a rule or a control.
The company has recently imposed new safety rules and regulations to reduce accidents.
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Regulation is the process of controlling something, usually with rules.
The government is reducing regulation of the airlines.
regulation
Adjective
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If something is regulation, it is made or done according to the rules.
This isn't a regulation soccer ball. It's too small.
a
Determinative
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A is used when the following word could be any of a certain type.
Compare "A book I saw on the shelf" and "The book I gave you yesterday".
a
Noun
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A is the first letter of the alphabet.
The letter "a" comes before "b".
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In some schools, an A is a very high grade.
Ron got an A on his earth science test.