The definition of a main idea is a sentence or generalization that tells what the paragraph is about. Main Ideas are generally found at the beginning of the paragraph, however they can be anywhere in the paragraph.
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What Is the Definition of Main Idea
the most important or central thought of a paragraph or larger section of text, which tells the reader what the text is about: Find the main idea in each paragraph.
Main idea means important information that says more about the overall purpose of an article or section of a text. Instead of main Idea one can use main heading which essentially depicts the same meaning.