Which dictionary brand launched the famous "Defining Your World" campaign in 2003 that featured people using the dictionary to navigate challenging real-life situations?

In the world of dictionaries and language reference tools, one marketing campaign stands out as revolutionary for transforming a traditional product into a cultural phenomenon. This campaign changed how people viewed dictionaries - from dusty reference books to essential tools for self-improvement and communication. Test your knowledge about this landmark product marketing case study that influenced how language learning products are marketed to this day.

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Merriam-Webster
Oxford English Dictionary
American Heritage Dictionary
Cambridge Dictionary