We found 5 dictionaries that define the word zero hours:

General (5 matching dictionaries)

1. zero hours: Longman Dictionary of Contemporary English
2. zero hours: Merriam-Webster
3. zero hours: Collins English Dictionary
4. zero hours: Vocabulary.com
5. zero hours: Wiktionary

(Note: See zero_hour as well.)

Definitions from Wiktionary (zero hour) ▸ noun:  Synonym of H-hour. ▸ Also see zero_hour ▸ Words similar to zero hours ▸ Usage examples for zero hours ▸ Idioms related to zero hours ▸ Wikipedia articles (New!) ▸ Words that often appear near zero hours ▸ Rhymes of zero hours ▸ Invented words related to zero hours