| Dictionary | Link / Source | Notes | |------------|---------------|-------| | (Princeton) | wordnet.princeton.edu | Lexical database, not a traditional dictionary | | Webster’s Revised Unabridged 1913 | Project Gutenberg | Old, but public domain | | The Free Dictionary (by Farlex) | thefreedictionary.com | Web-based, no PDF, but excellent | Final Recommendation Do not search for “Longman Dictionary of Contemporary English PDF free” — you will find pirate sites that may contain malware, and downloading them is illegal.
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I understand you're looking for guidance on the in PDF format. However, I must clarify that distributing or downloading copyrighted PDFs of the LDOCE for free is illegal, as the dictionary is a commercial product protected by copyright law. | Dictionary | Link / Source | Notes