* Bachelor's degrees: These are undergraduate degrees, usually taking three or four years to complete.
* Master's degrees: These are postgraduate degrees, building upon a bachelor's degree and usually taking one to two years.
* Doctoral degrees (PhDs): These are advanced research degrees, often requiring several years of study beyond a master's degree.
* Professional degrees: These are degrees focused on specific professions, like medicine (MD), law (JD), or dentistry (DDS), and often require more than four years of study.
Essentially, if someone has completed a degree or professional program *beyond* high school, they are considered to have received tertiary education.