/mayn"stay'/ , n.
1. Naut. 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.
[ 1475-85; MAIN 1 + STAY 2 ]
Syn. 2. pillar, bulwark, anchor, prop.
/mayn"stay'/ , n.
1. Naut. 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.
[ 1475-85; MAIN 1 + STAY 2 ]
Syn. 2. pillar, bulwark, anchor, prop.
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012