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mainstay

American  
[meyn-stey] / ˈmeɪnˌsteɪ /

noun

  1. Nautical. the stay that secures the mainmast forward.

  2. a person or thing that acts as a chief support or part.

    Coffee is the mainstay of the country's economy.

    Synonyms:
    prop, anchor, bulwark, pillar

mainstay British  
/ ˈmeɪnˌsteɪ /

noun

  1. nautical the forestay that braces the mainmast

  2. a chief support

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of mainstay

First recorded in 1475–85; main 1 + stay 2

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

They weren’t always the flashiest businesses, but they built the Baltimore company into a grocery store mainstay.

From The Wall Street Journal

"I see him being a big success for England and being a mainstay for years."

From BBC

Troubled singer-songwriters are a mainstay in the mythology of American roots music.

From The Wall Street Journal

The Astros had been a mainstay atop the AL West for eight years — claiming seven division titles during that time — but now the division appears to be under new management.

From Los Angeles Times

Scams have become a "mainstay" of modern crime and are "increasingly difficult to investigate because of their transnational nature", said Jeffery Chin, deputy director at the police Scam Public Education Office.

From Barron's