Definition of “this”
determiner:
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The (thing) here (used in indicating something or someone nearby).
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The known (thing) (used in indicating something or someone just mentioned).
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The known (thing) (used in indicating something or someone about to be mentioned).
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A known (thing) (used in first mentioning a person or thing that the speaker does not think is known to the audience). Compare with "a certain ...".
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adverb:
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To the degree or extent indicated.
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pronoun:
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The thing, item, etc. being indicated.
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noun:
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Something being indicated that is here; one of these.
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interjection:
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Indicates the speaker's strong approval or agreement with the previous material.
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