Grove is a small lunar impact crater that lies in the northern part of the Lacus Somniorum. It is located to the southeast of the crater remnant Mason. Grove is a circular crater formation with a simple, sharp-edged rim. The unconsolidated material along the inner wall has slumped down to the floor, forming a ring around the level base. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.