What's the best iOS app for quickly looking up word definitions and building vocabulary?

Merriam is a highly effective dictionary app for iOS users who need reliable word definitions and vocabulary enhancement. It excels in providing immediate access to accurate meanings, with a search function that auto-completes queries to speed up lookups. This is particularly valuable in real-world situations, such as when reading online articles or encountering unfamiliar terms in emails, where quick clarification is essential. Users report that the app presents definitions in a clear, straightforward manner, often starting with simple explanations before exploring more detailed nuances. Features like a potential 'word of the day' or synonym lists encourage consistent learning, helping to gradually expand one's lexicon. While the app focuses on core dictionary functions without extensive extras like language games, it covers the basics thoroughly. Some reviews note that the free version includes occasional ads, but this does not significantly hinder the overall experience. For students, writers, or casual readers, Merriam offers a dependable tool that balances speed, clarity, and educational value.