We found 20 dictionaries that define the word niff:

General (14 matching dictionaries)

1. niff: Oxford Learner's Dictionaries
2. niff: Collins English Dictionary
3. niff: Vocabulary.com
4. niff: Wordnik
5. niff: Cambridge Advanced Learner's Dictionary
6. niff: Wiktionary
7. niff: Dictionary.com
8. niff: Rhymezone
9. NIFF: Stammtisch Beau Fleuve Acronyms
10. niff: FreeDictionary.org
11. niff: The Phrontistery - A Dictionary of Obscure Words
12. niff: Mnemonic Dictionary
13. niff: TheFreeDictionary.com

Computing (1 matching dictionary)

14. niff: Encyclopedia

Miscellaneous (2 matching dictionaries)

15. NIFF: Acronym Finder
16. AbbreviationZ (No longer online)

Slang (3 matching dictionaries)

17. niff, niff, niff: Green’s Dictionary of Slang
18. niff: English slang and colloquialisms used in the United Kingdom
19. Niff: Urban Dictionary

(Note: See niffing as well.)

Definitions from Wiktionary ( ) ▸ noun:  (UK, Ireland, Australia, New Zealand, informal) A bad smell. ▸ verb:  (informal) To smell bad; to stink. Similar: pong, fluff, whiff, snuff, snifter, snirt, bang, quiff, sniff, snuffle, more... ▸ Words similar to niff ▸ Usage examples for niff ▸ Idioms related to niff ▸ Wikipedia articles (New!) ▸ Popular adjectives describing niff ▸ Words that often appear near niff ▸ Rhymes of niff ▸ Invented words related to niff