An abstract noun is the name we give to something that is not material. It could be an idea or a quality for example. Greed, honesty, selfishness are all abstract nouns.
They are contrasted with concrete nouns which are things that exist physically. People, school, book.
In the same way that we know you are a Russian-speaking student in the Russian Federation. We all have a personal profile. Click on my name, then on 'View Profile' and you will find out a little bit about me.
One reason we ask people to be honest in their profiles is that a knowledge of a member's occupation, native language and location may help us give a more helpful response to their questions.
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