Englishfor English speakers
restricted
Adjective
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If something is restricted, it is limited.
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If something is restricted, it is available only to certain people.
You can't come in here! This is a restricted area!
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One of the levels of the secrecy of an official document.
solution
Noun
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A solution is an answer to a problem.
The solution to the math problem 4+3 is 7.
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A solution is a liquid that has something dissolved in it.
The student made a solution by mixing salt and water.