Englishfor English speakers
reference
Noun
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A reference is something that can be compared to.
When making your model, use the model I created as a reference.
reference
Verb
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When you reference something, you cite it as a source.
Reference the dictionary for the definition of this word.
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When you reference something, you mention it.
tool
Noun
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A tool is an object that you use to do a specific job, such as a hammer.
I used to fix my own car, but I sold all my tools.
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A tool is a person being used by another person or organization.
He is such a tool. He should think for himself, instead of doing everything they tell him to do.