We found 8 dictionaries that define the word first responders:

General (6 matching dictionaries)

1. first responders: Merriam-Webster
2. first responders: Collins English Dictionary
3. first-responders: Wordnik
4. first responders: Wiktionary
5. First Responders (The Unit), First responders: Wikipedia, the Free Encyclopedia
6. First responders: TheFreeDictionary.com

Medicine (1 matching dictionary)

7. First responders: Medical dictionary

Tech (1 matching dictionary)

8. DOD Dictionary of Military Terms (No longer online)

▸ Words similar to first responders ▸ Usage examples for first responders ▸ Idioms related to first responders ▸ Wikipedia articles (New!) ▸ Words that often appear near first responders ▸ Rhymes of first responders ▸ Invented words related to first responders