We found 15 dictionaries that define the word crab grass:

General (12 matching dictionaries)

1. crab grass: Collins English Dictionary
2. crab grass: Vocabulary.com
3. crab-grass, crab grass: Wordnik
4. crab grass: The Wordsmyth English Dictionary-Thesaurus
5. crab grass: Infoplease Dictionary
6. Crab grass, crab grass: Dictionary.com
7. Crab grass: Wikipedia, the Free Encyclopedia
8. crab grass: Rhymezone
9. crab-grass: Webster's 1828 Dictionary
10. crab grass: FreeDictionary.org
11. crab grass: Mnemonic Dictionary
12. crab grass: TheFreeDictionary.com

Computing (1 matching dictionary)

13. crab grass: Encyclopedia

Medicine (1 matching dictionary)

14. crab grass: Medical dictionary

Slang (1 matching dictionary)

15. crab grass: Urban Dictionary

Definitions from WordNet (crab grass) ▸ noun:  grasses with creeping stems that root freely; a pest in lawns Opposite: lawn, turf, sod Types: quackgrass, witchgrass, crabgrass, more... ▸ Words similar to crab grass ▸ Usage examples for crab grass ▸ Idioms related to crab grass ▸ Wikipedia articles (New!) ▸ Words that often appear near crab grass ▸ Rhymes of crab grass ▸ Invented words related to crab grass