An English dictionary is a book that contains a list of up to more than 250000 English words with their meanings. Because all the words are arranged in alphabetical order, English learners will find it easy to look up a word in a short period of time. The English dictionary will tell you what a word means and what part of speech it is (e.g. a noun, a verb or an adjective). Dictionaries are also available in electronic form such as electronic dictionaries. also known