The third in order or level. In the sequence of events, the tertiary stage involves finalizing the project details.
A period in the Cenozoic Era, following the Secondary period, characterized by the development of mammals. The Tertiary period saw significant evolutionary changes in mammals and birds.
An institution of higher education, such as a university or college. After completing secondary school, she enrolled in a tertiary institution to pursue her degree.
A color produced by mixing two secondary colors in equal proportions. Brown is often classified as a tertiary because it results from blending orange and green.
A lay member of a religious order who observes the rule in the world; a member of a third order, especially within the Franciscan tradition. The tertiaries met weekly to pray and perform works of charity in their community.