If you are a student trying to learn English as a second language as it is not your mother tongue, you can be greatly helped by good quality dictionaries. There are many standard dictionaries that you can use to develop a strong vocabulary and to understand the usage of words. Longman Dictionary is regarded as an authority as far as English dictionaries are concerned. If you have not bought it as it is expensive, you can get Longman Dictionary free full version here from this website and download and install it on the hard drive of your computer. Become proficient in English language with this masterful dictionary quickly and easily.