You can find this dictionary at http://dict.idioms.moe.edu.tw/.
Idiom dictionary upgraded
The Ministry of Education said yesterday that it had added an English function to its online idiom dictionary (dict.idioms.moe.edu.tw) and it would expand the content for English users in the near future.
The Dictionary of Chinese Idioms, which was launched online five years ago, now allows users to search for idioms by entering key words in either Chinese or English.
“Although the English search function is limited at the moment, we are planning to provide English translations for all the Chinese idioms in the dictionary,” said Chen I-mei, a member of the ministry’s National Language Committee.
The ministry has been testing that function and hopes it will be ready for public use later this year, she said. The online dictionary contains about 25,000 Chinese idioms and the ministry plans to add more gradually, she said.