comby UK /ˈkəʊmi/US /ˈkoʊmi/ adjective3 •Resembling or characteristic of a comb. •(US) Of a wheel: having a defect consisting of a network of fine cracks covering a small area of the tread. •(no longer used) Formed of vertical plates, or combs.Some parts of a vein may exhibit a comby structure, while others show no trace of any particular arrangement. — 1884 formsmore comby · most comby