seif dune

/ seɪf /

noun

1. (in deserts, esp the Sahara) a long ridge of blown sand, often several miles long

seif dune

/ sāf,sīf /

1. A sharp-crested longitudinal sand dune or chain of sand dunes common to the Sahara and ranging up to 300 m (984 ft) in height and 300 km (186 mi) in length.

Word History and Origins

Origin of seif dune¹

seif, from Arabic: sword, from the shape of the dune