a rounded stone larger than a pebble and smaller than a boulder, formerly much used for paving streets
Origin of cobblestoneMiddle English cobel ston: see cobble and amp; stone
A paving stone, especially one that is naturally rounded.
Origin of cobblestoneMiddle English cobelston : obsolete cobel, probably diminutive of cob, round object; see cob + Middle English ston, stone, stone; see stone.
Acorn Street on Beacon Hill