Lo Zingarelli 2003 : vocabolario della lingua italiana
Zanichelli (2002)
This comprehensive monolingual dictionary contains 134,000 words with 370,000 meanings; 40,000 idioms and 71,000 etymologies.
Also has black and white and colour illustrations; literary citations by 90 authors; Appendices contain abbreviations, symbols, proverbs, geographical names; Latin phrases.
IT DICO 2 Open access