The phrase "a third pillar of" is correct and usable in written English.
It can be used to refer to an additional foundational element or principle that supports a broader concept or system.
Example: "Sustainability is a third pillar of our corporate strategy, alongside innovation and customer satisfaction."
Alternatives: "an additional foundation of" or "a supplementary element of".
It is now winning a third pillar of support with its efficient running of the municipalities that it won in two rounds of elections earlier this year.
Looking forward, security will join those as a third pillar of what people demand from all computing experiences".
"There is certainly nothing to suggest that there isn't enough opportunity there for us to make it a third pillar of the company," asserts George Turner George Turner, who runs Life Sciences.
The question now is what skills are required to answer the report's call and operationalize impact as a third pillar of capital markets?
In 1994, the Centennial Olympic Congress of Paris established the environment as a "third pillar" of the Olympic charter, along with sport and culture.
In officially embracing hybrid warfare, the Pentagon would be replacing a second pillar of long-term planning.
In addition, the growth that some are now calling for has been a second pillar of our policy alongside solid finances".
Add up China's resources and those of Taiwan, Hong Kong and Macau, and you get something monstrously strong, a fourth pillar of the world economy alongside America, Europe and Japan.
France is trying to coordinate a second pillar of the European police force in Afghanistan to do training in the countryside for periods of up to 11 months.
The crisis is "above all a liquidity crunch," Mr. Steinbrück said, explaining why recapitalization would be "a second pillar" of Berlin's strategy.
A second pillar of America's retirement system — 401 k)'s — is voluntary, although some employers have embraced automatic enrollment for their employees while giving them the right to opt out.
