We found 10 dictionaries that define the word dead flat:

General (6 matching dictionaries)

1. dead flat: Merriam-Webster
2. dead-flat, dead flat: Wordnik
3. Dead flat: Dictionary.com
4. dead flat: FreeDictionary.org
5. Dead flat: TheFreeDictionary.com
6. dead flat: Wiktionary

Business (1 matching dictionary)

7. Construction Term Glossary (No longer online)

Computing (1 matching dictionary)

8. dead flat: Encyclopedia

Miscellaneous (1 matching dictionary)

9. Encyclopedia of Graphic Symbols (No longer online)

Tech (1 matching dictionary)

10. Metal Terminology (No longer online)

Definitions from Wiktionary (dead flat) ▸ noun:  (nautical) The widest cross-section of a ship. Similar: flatness, dead on, deadness, flatline, deadpan, deadened, flattened, lifeless, flat out, deadend, more... Opposite: uneven, bumpy, hilly, undulating, sloping ▸ Words similar to dead flat ▸ Usage examples for dead flat ▸ Idioms related to dead flat ▸ Wikipedia articles (New!) ▸ Words that often appear near dead flat ▸ Rhymes of dead flat ▸ Invented words related to dead flat