A shallow pit or other edged depression in a road's surface, especially when caused by erosion by weather or traffic.
A pit formed in the bed of a turbulent stream.
A pit resulting from unauthorized excavation by treasure hunters or vandals.
A shallow hole dug for the purpose of prospecting for opal or gold.
A hole or recess on the top of a stove into which a pot may be placed.
A vertical cave system, often found in limestone.
A bulge: something that bulges out or is protuberant or projects from a form.
The state of being prominent: widely known or eminent.
Autonomous height; relative height or prime factor; a concept used in the categorization of hills and mountains.
A gaseous projection, often loop-shaped, springing from the surface of the Sun or a star.
Relative importance.