A bilingual dictionary is a reference book that provides translations between two languages. It helps users find the meaning of words in one language and their equivalent in another. Bilingual dictionaries are useful for language learners, travelers, and anyone needing to communicate in different languages. These dictionaries often include additional information, such as pronunciation guides, example sentences, and grammatical notes. They can be found in print or digital formats, with many online resources available. Popular examples include dictionaries for languages like Spanish, French, and Chinese, catering to various language pairs.