(informal)(of a person) use long and obscure words when speaking(非正式)（说话时）使用又长又晦涩的词语
柯林斯高阶英汉双解学习词典释义
N-COUNT
词典;字典;辞书
A dictionary is a book in which the words and phrases of a language are listed alphabetically, together with their meanings or their translations in another language.