Giant Dictionary is a free educational reference tool developed by PerfectApp for Android devices. This app provides users with a comprehensive dictionary and thesaurus that includes definitions, synonyms, antonyms, idioms, word origins, quotes, example sentences, and Word of the Day. Users can look up the meaning of words, slang, phrases, idioms, and abbreviations in English-English and 18 other languages, including Bulgarian, Chinese, Croatian, Dutch, German, Greek, French, Hebrew, Hindi, Hungarian, Italian, Japanese, Korean, Portuguese, Romanian, Russian, Spanish, Swedish, and Turkish.

The user interface is simple and easy to navigate, making it accessible to all users. The app's search function is powerful and allows users to find any word or phrase quickly. The app also has a history feature that allows users to keep track of their previous searches. Overall, Giant Dictionary is a reliable and efficient tool for anyone looking to improve their language skills and expand their vocabulary.