Dictionary definition · roach
noun
- a roll of hair brushed back from the forehead
- the butt of a marijuana cigarette
- street names for flunitrazepam
- any of numerous chiefly nocturnal insects; some are domestic pests
- European freshwater food fish having a greenish back
verb
- comb (hair) into a roach
- cut the mane off (a horse)
Source: Open English WordNet (CC BY 4.0).