English Reference
noun

mainstay

n.
US /ˈmeɪnˌsteɪ/ UK /mˈeɪnsteɪ/ main·stay UK spelling mainstays

  1. 01 C2 Proficiency Technical Science

    a strong rope that supports the main mast of a ship.

    a heavy stay or rope extending from the maintop to the foot of the foremast to support the mainmast.

    Simple

    The sailors checked the mainstay for wear before the storm arrived.

    In context

    The ship's structural integrity depended on the tension of the mainstay, which prevented the mainmast from buckling under the pressure of high winds.

    Usage

    In modern contexts, this sense is restricted to maritime history or sailing technicalities.

Digital media and the people who star in it have been cultural mainstays for teens' entire lives, so creating social media, video or podcast content seems a natural, albeit nontraditional, career path.

Phys.org· 14 Aug 2026

In his year were other musicians who have also become Grammy mainstays: Chief Adjuah, Trombone Shorty and Jon Batiste.

The Guardian· 10 Aug 2026

From Middle English main stai, equivalent to main + stay (“rope”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Middle English main stai
Level C1 · Advanced
Frequency Occasional
Updated