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

General (2 matching dictionaries)

1. be on the line: Cambridge Advanced Learner's Dictionary
2. be on the line: Longman Dictionary of Contemporary English

Miscellaneous (1 matching dictionary)

3. be on the line: Idioms

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