It is important to clarify that Merriam-Webster has not yet published a 12th Edition of its flagship Collegiate Dictionary. The current, most up-to-date version is the 11th Edition (published in 2003, with periodic updates to the online and digital versions).
The 12th Edition introduces substantial shifts in how the dictionary presents language: merriam webster collegiate dictionary 12th edition
It includes 1,000 new phrases and idioms, along with over 20,000 additional usage examples to help readers understand words in context. Deep Dives: It is important to clarify that Merriam-Webster has