Englishfor English speakers
upper
Adjective
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The upper thing is the one that is in a higher position.
The upper floors of the building are for offices and the lower floors for housing.
upper
Noun
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A drug that stimulates a body. Uppers give a person energy and lower hunger.
He takes uppers so that he can stay awake all night studying.
estimate
Noun
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An estimate is a judgement of a size, value, amount, cost, etc., which is based on incomplete information.
British Telecom will give you an estimate of the cost before doing any work.
estimate
Verb
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If you estimate the number, size, value, amount, cost, etc. of something, you guess based on incomplete information.
It's difficult to estimate how long it will take to get to London because we don't know how bad the traffic will be.