Dictionary.net

• A joint in a stone pavement where the stones are left slightly higher than elsewhere, the rest of the surface being sunken or dished. The raised surface is intended to prevent the settling of water in the joints.

2010 - New Age Dictionary Database
By Oddity Software

• A joint in a stone pavement where the stones are left slightly higher than elsewhere, the rest of the surface being sunken or dished. The raised surface is intended to prevent the settling of water in the joints.

1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.