Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “mainstay”

mainstay

noun [C, usually singular]
 
 
/ˈmeɪnsteɪ/
the most important part of something, providing support for everything else: the mainstay of sth Antibiotic therapy is the mainstay of treatment for many infections. Cattle farming is the mainstay of the country's economy.
(Definition of mainstay from the Cambridge Business English Dictionary © Cambridge University Press)
What is the pronunciation of mainstay?
Add Cambridge dictionaries to your browser to your website

Definitions of “mainstay” in other dictionaries

Word of the Day

first:

(a person or thing) coming before all others in order, time, amount, quality, or importance

Word of the Day

Countability – grammar codes

by Dom Glennon​​,
November 26, 2014
Advices and informations Have you ever noticed strange codes in square brackets on entries in Cambridge Dictionaries Online and wondered what they mean? These are grammar codes, giving you a brief summary of how that word behaves grammatically. More information can be obtained by hovering your cursor over the code, and there’s

Read More 

ped-text verb

November 24, 2014
to text someone while walking I’m ped-texting, I’m looking down at my phone, 75 percent of the time.

Read More