We found 9 dictionaries that define the word have no idea:

General (5 matching dictionaries)

1. have no idea: Merriam-Webster
2. have no idea: Oxford Learner's Dictionaries
3. have no idea: Wiktionary
4. Have No Idea: A to Z list of the most popular idioms
5. have no idea: TheFreeDictionary.com

Business (1 matching dictionary)

6. have no idea: Legal dictionary

Computing (1 matching dictionary)

7. have no idea: Encyclopedia

Medicine (1 matching dictionary)

8. have no idea: Medical dictionary

Miscellaneous (1 matching dictionary)

9. have no idea: Idioms

Definitions from Wiktionary (have no idea) ▸ verb:  To not know at all. ▸ verb:  To be mistaken; to not have a correct idea. Similar: not have the faintest idea, not have the first idea, not have the faintest, not know which end is up, know beans about, unken, know of, go for nothing, draw a blank, miss the memo, more... Opposite: know for sure, be certain, be aware, have knowledge of Types: clueless, dumb, no clue, not know, not know anything, more... Phrases: have got no idea, you have no idea, have no idea who that person is, someone have no idea, to have no idea, more... ▸ Words similar to have no idea ▸ Usage examples for have no idea ▸ Idioms related to have no idea ▸ Wikipedia articles (New!) ▸ Words that often appear near have no idea ▸ Rhymes of have no idea ▸ Invented words related to have no idea