pothole

Short definition from Wiktionary

Noun

1. 1
   A shallow pit or other edged depression in a road's surface, especially when caused by erosion by weather or traffic.
2. 2
   A pit formed in the bed of a turbulent stream.
3. 3
   A vertical cave system, often found in limestone.
4. 4
   A pit resulting from unauthorized excavation by treasure-hunters or vandals.
5. 5
   A shallow hole dug for the purpose of prospecting for opal or gold.
6. 6
   A hyperlink with text displayed on a page that is different from the title of the page to which the text links; a piped link.
7. 7
   A hole or recess on the top of a stove into which a pot may be placed.