0 used to describe something that is organized in two levels or stages:
Council functions throughout Cornwall were organised on a two-tier basis, with a county council and district councils.
The company proposed to replace its two-tier board with a single board of directors.
The disaster led to the introduction of a two-tiered security system at American airports.
We have a two-tier system in this city, because there are so many private schools.
Broadband prices are now two-tier, with providers charging as much as £100 extra if you live in the country.
1 used to describe something that has two levels, one on top of the other:
2 consisting of two levels:
There has to be a two-tier approach, with differing arrangements in different regions.
Companies have the choice to opt for either the one-tier or the two-tier administrative system.
UK MPs and union leaders have branded the plans "back-door privatisation" which will create a two-tier health service.
Head teachers praised the plan, saying it overcame the fear of a "two-tier" education system.
Under our two-tier system, none of these treatments are available unless you can pay.
The economy's two-tiered recovery brought high-paying jobs, but only in some areas.
The old football stand is to be replaced with a two-tier 8,500-seater construction.
