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.
f
Noun
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F is the sixth letter of the alphabet.
"e" comes before "f"
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In some schools, an F is a grade that shows that you have failed completely.
This student has not made any attempt in the exam; he only got an F.