Englishfor English speakers
idea
Noun
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An idea is a concept or a thought.
It was a good idea.
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An idea is something abstract (not concrete).
Love is just an idea.
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An idea is a way to see something, a view.
He changed her ideas on religion.
advertising
Noun
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Advertising is the business or study of using newspapers, TV, etc. to sell products or inform people.
Coke has a new advertising campaign for a new drink.
There's too much advertising on radio.