Englishfor English speakers
button
Noun
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A button is a round object that can be pushed through clothing so that the clothing stays on.
Sarah's sweater doesn't work anymore because the buttons popped off.
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A button is a switch that is turned on by pressing it.
I pressed the button to turn on the television.
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A button is a badge that can be worn of clothing and is put onto the clothing with a pin to hold it in place.
I have a "Vote for Bush" button.
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If a poker player has the button, he is the last person to act on that hand.
button
Verb
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If you button something, you fasten it with a button.
Button up your coat!
AD
Abbreviation
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AD is short for the Latin words anno Domini, which means in the year of our Lord. You use AD to refer to a date after the year in which Jesus Christ is believed to have been born.
The Romans started building the Colosseum in 70 AD.
ad
Noun
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A short way of saying advertisement.
I saw an ad in the newspaper for a job at the factory.