Dictionary and Etymology – Word Definitions (Wiktionary)

Use this endpoint when you need structured, part-of-speech-grouped definitions with usage examples for English words, especially when you want Wiktionary's open, comprehensive coverage including technical, archaic, or multi-sense words. Prefer this over general LLM-generated definitions when you need a citable, Wiktionary-sourced answer with sub-senses and real usage examples. It is better than etymology-focused endpoints when definitions are the primary need, and better than spelling-check endpoints when sense content (not just validity) is required.

• Word not found in Wiktionary – returns empty entries or a verdict indicating no coverage
• Non-English words rejected – endpoint only supports English words
• Invalid part-of-speech filter yields no results if that POS doesn't exist for the word
• Limit parameter outside 1–10 range may be ignored or cause an error
• Network or upstream Wiktionary outage returns degraded flag or empty response
• Very obscure or newly coined words may have incomplete Wiktionary entries