Definition of seif in English:

seif

Line breaks: seif
Pronunciation: /siːf
 
, seɪf
 
/
(also seif dune)

noun

A sand dune in the form of a long, narrow ridge.
More example sentences
  • Linear or seif dunes occur in areas of more variable winds and show less lateral movement; star-shaped dunes develop in areas of very variable winds and show little lateral movement and considerable vertical accretion.

Origin

early 20th century: from Arabic sayf 'sword' (because of the shape).

Definition of seif in:

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Pronunciation: ˌhɪpnə(ʊ)ˈpɒmpɪk
adjective
relating to the state immediately preceding waking up