Which major dictionary brand rebranded in 2014 with the tagline 'Define Your World' to appeal to digital-native language learners, moving away from their traditional academic positioning?

In the world of language resources, dictionaries and language learning tools occasionally undergo significant rebranding to stay relevant in changing markets. This poll tests your knowledge about a major dictionary brand's positioning shift that made headlines in the linguistics and publishing worlds. Can you identify which famous dictionary underwent this particular transformation?

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Merriam-Webster
Oxford English Dictionary
Cambridge Dictionary
Collins Dictionary