adjective
providing knowledge or information; serving to instruct or inform
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The instructive manual provided detailed step-by-step guidance on how to assemble the furniture.
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The video tutorial was really instructive and helped me fix my car's brakes on my own.
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That YouTube channel has some really instructive content that can teach you a lot about photography.
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Reading biographies of successful people can be instructive in shaping our own paths to success.