A rounded stone from a river bed, fit for use as ballast in ships and for paving roads. / (uncountable) The material made from cobblestones.

plural of cobblestone

Cobbled; laid with cobblestones. / (medicine) Exhibiting cobblestoning.

(medicine) Any lumpy appearance of the trachea, lungs, etc. caused by regular nodules.

(US) Lumps of ice mixed with sand and salt accumulated on highways