Duolingo is the world's most popular way to learn a language. It's 100% free, fun and science-based. Practice online on duolingo.com or on the apps!

The most popular dictionary and thesaurus for learners of English. Meanings and definitions of words with pronunciations and translations.

Translations in context of words, groups of words and idioms; a free dictionary with millions of examples in Arabic, German, Spanish, French, Hebrew, Italian, Japanese, Korean, Dutch, Polish, Portuguese, Romanian, Russian, Swedish, Turkish, Ukrainian, Chinese and English.

WantWords（原：万词王）是唯一支持中文及中英跨语言查询的反向词典系统，可以通过描述意思来查找词语。WantWords基于最先进的人工智能和自然语言处理算法实现，由清华大学自然语言处理实验室出品。