Undergraduate education refers to the level of education that follows secondary education and precedes postgraduate or graduate studies. It typically includes bachelor's degree programs, which are the first degree earned by students after completing high school or its equivalent.

Graduate education, also known as postgraduate education, refers to advanced academic programs that follow completion of an undergraduate degree. It typically includes master's degrees and doctoral degrees, offering specialized and in-depth study in a particular field or discipline.

Lifelong learning refers to the ongoing process of acquiring knowledge, skills, and competencies throughout one's life, beyond formal education. It emphasizes the idea that learning is not limited to a specific time or place but is a continuous pursuit that can occur at any stage of life.