What it does
Merriam-Webster combines an English dictionary search with thesaurus, grammar, usage and word-history features.
Use the dictionary search for a word you need to understand, then turn to the grammar and usage articles when the question concerns how to use it. The site also links a thesaurus and word-focused features. Keeping those tasks distinct helps: a synonym suggestion answers a writing question, while a dictionary entry establishes the intended sense.
Strengths
- Dictionary lookup and usage reading are available together
Best for
- Checking English words while reading or writing
Sources
- Merriam-Webster: America's Most Trusted Dictionary (Oct 26, 2026)