# sea stack

> English word · Noun · IPA /ˈsiː ˌstæk/

## Definitions
1. A pillar of rock that rises from the ocean, formed by surrounding softer ground eroding away.

## Etymology
From sea + stack (“a heap, pile; large vertical column of rock in the sea”); stack is derived from Middle English stak (“a heap, pile, stack; large vertical column of rock in the sea”) [and other forms], from Old Norse stakkr (“a heap, pile; haystack; barn”) (compare Faroese stakkur (“sea stack”)), from Proto-Germanic *stakkaz (“pile of hay, haystack”), ultimately from Proto-Indo-European *(s)teg- (“beam, pole, stick”).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/sea-stack