We found 8 dictionaries that define the word knock against:

General (6 matching dictionaries)

1. knock against: Vocabulary.com
2. knock against: Dictionary.com
3. knock against: Rhymezone
4. knock against: FreeDictionary.org
5. knock against: Mnemonic Dictionary
6. knock against: TheFreeDictionary.com

Business (1 matching dictionary)

7. knock against: Legal dictionary

Miscellaneous (1 matching dictionary)

8. knock against: Idioms

Definitions from WordNet (knock against) ▸ verb:  collide violently with an obstacle Opposite: bump into, collide with, hit, strike, impact ▸ Words similar to knock against ▸ Usage examples for knock against ▸ Idioms related to knock against ▸ Wikipedia articles (New!) ▸ Words that often appear near knock against ▸ Rhymes of knock against ▸ Invented words related to knock against