We found 3 dictionaries that define the word in an undertone:

General (3 matching dictionaries)

1. in an undertone: Cambridge Advanced Learner's Dictionary

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