1. third in order or level; of third rank or importance
2. relating to education at the college or university level
3. relating to the service sector of the economy
Usage: economics

1. the third period of the Cenozoic Era
Usage: geology

Examples

• The tertiary colors are created by mixing primary and secondary colors.
• She pursued tertiary education at a prestigious university.
• The country’s economy relies heavily on tertiary industries like banking and tourism.
• Fossils from the Tertiary period show early mammalian development.
• This is only a tertiary concern compared to our main objectives.
• Tertiary care hospitals provide specialized medical services.
• The tertiary structure of proteins determines their function.