Longman Dictionary of Contemporary English (ISBN 0-582-77646-5) was first published by Longman in 1978. The dictionary is available in various formats: paper with a bundled DVD-ROM or freely online. The LDOCE is advanced learner's dictionary, providing definitions by using a restricted vocabulary, helping non-native English speakers to get meanings easily. The free LDOCE online has been updated in its layout and released on 25 August 2008. The website offers search with spelling feature, definition, collocations, many examples and pictures. Its DVD version has had support for Linux since 2004.
The latest version of Longman Dictionary of Contemporary English is the fifth edition. The sixth edition is going to be released in April 2014.