We found 3 dictionaries that define the word on the firing line:

General (2 matching dictionaries)

1. on the firing line: Merriam-Webster
2. on the firing line: Cambridge Advanced Learner's Dictionary

Miscellaneous (1 matching dictionary)

3. on the firing line: Idioms

▸ Words similar to on the firing line ▸ Usage examples for on the firing line ▸ Idioms related to on the firing line ▸ Wikipedia articles (New!) ▸ Words that often appear near on the firing line ▸ Rhymes of on the firing line ▸ Invented words related to on the firing line