We found 4 dictionaries that define the word the greatest thing since sliced bread:

General (2 matching dictionaries)

1. the greatest thing since sliced bread: Merriam-Webster
2. The greatest thing since sliced bread: TheFreeDictionary.com

Computing (1 matching dictionary)

3. The greatest thing since sliced bread: Encyclopedia

Miscellaneous (1 matching dictionary)

4. the greatest thing since sliced bread: Idioms

▸ Words similar to the greatest thing since sliced bread ▸ Usage examples for the greatest thing since sliced bread ▸ Idioms related to the greatest thing since sliced bread ▸ Wikipedia articles (New!) ▸ Words that often appear near the greatest thing since sliced bread ▸ Rhymes of the greatest thing since sliced bread ▸ Invented words related to the greatest thing since sliced bread