What is the meaning of Dolmen?

A prehistoric megalithic tomb consisting of a capstone supported by two or more upright stones, most having originally been covered with earth or smaller stones to form a barrow.

Any megalithic tomb, including passage graves and wedge tombs.

dolmen (tomb consisting of a capstone supported by two or more upright stones)

{l|en|dolmen}} (tomb consisting of a capstone supported by two or more upright stones)

dolmen (tomb consisting of a capstone supported by two or more upright stones)

dolmen (tomb consisting of a capstone supported by two or more upright stones)

dolmen (tomb consisting of a capstone supported by two or more upright stones)

definite singular of dolme

Source: wiktionary.org