# seif

> English word · Noun · frequency rank #63,985

## Definitions
1. A sand dune that elongates parallel to the prevailing wind.

## Etymology
From Arabic سَيْف (sayf, “sword”). Doublet of xiphos.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/seif