University students attend tertiary courses.

Tertiary alcohols are organic compounds with a hydroxyl group attached to a tertiary carbon atom.

Tertiary alcohol is a type of alcohol with a carbon atom bonded to three other carbon atoms.

The tertiary sector of the economy is growing.

The Tertiary period is characterized by significant geological changes.

This road is a tertiary road.

Tertiary industries are important for the economy.

We are outsourcing our services to improve efficiency.

I outsourced the house cleaning service.

The expansion of the tertiary sector in the economy is constantly growing.