We found 8 dictionaries that define the word efr:

General (5 matching dictionaries)

1. efr: Wordnik
2. EFR: Dictionary.com
3. EFR: Wikipedia, the Free Encyclopedia
4. EFR: Stammtisch Beau Fleuve Acronyms
5. EFR: Wiktionary

Miscellaneous (2 matching dictionaries)

6. EFR: Acronym Finder
7. AbbreviationZ (No longer online)

Tech (1 matching dictionary)

8. SOLAR-TERRESTRIAL TERMS (No longer online)

Definitions from Wiktionary (EFR) ▸ noun:  Initialism of Emergency Federal Register. ▸ Words similar to efr ▸ Usage examples for efr ▸ Idioms related to efr ▸ Wikipedia articles (New!) ▸ Popular adjectives describing efr ▸ Words that often appear near efr ▸ Rhymes of efr ▸ Invented words related to efr