A dictionary is a collection of words in a language often arranged alphabetically. A dictionary gives the usage information, definition, pronunciation, phonetics and other information about each word it lists. Dictionaries are essential tools for learning a new language.
A dictionary is a reference book that gives the definition of words and phrases. Some words may have multiple meanings and a good dictionary will try to list all of these meanings. The most common form of a dictionary is a language dictionary that gives the meaning of the majority of words used in that language.