The word "lengthy" in English means: Lasting for a long time., Containing a lot of detail; very detailed and thorough..
The phonetic transcription of "lengthy" is /ˈleŋθi/ in British English and /ˈleŋθi/ in American English. Click the 🔊 button to hear both pronunciations.
Synonyms for "lengthy": long, extended, prolonged, extensive, detailed, thorough.
Example usage of "lengthy": "The movie was quite lengthy, over three hours long.". More examples on the page.