Consisting of meaning of every word, dictionary, being available almost in every language and very useful for people to learn and know the meaning of the words, plays main role in learning any language.
Dictionary is organized well with the order of alphabets of language, so that people can find meaning of any word easily whatever they want.
For an example: English Dictionary
If you want the meaning of “Mean” word, you can find the meaning of this word on dictionary by finding the “M” letter words according to English alphabets.
By using dictionaries, you may learn spellings of words, parts of speech, grammar, plural or singular, set of collections of the word and many more.
In briefly, this is about the use of the dictionary.