See student in Webster's New World College Dictionary
noun
a person who studies, or investigates: a student of human behavior
a person who is enrolled for study at a school, college, etc.
See student in American Heritage Dictionary 4
stu·dent
noun
One who is enrolled or attends classes at a school, college, or university.
a. One who studies something: a student of contemporary dance.
b. An attentive observer: a student of world affairs.
Origin: Middle English, alteration (influenced by Latin studēre, to study) of studient, studiant, from Old French estudiant, one who studies, from present participle of estudier, to study, from Medieval Latin studiāre, from Latin studium, study; see study .