The word "school" is primarily a noun. It refers to an educational institution where teaching and learning take place, such as primary, secondary, or higher education institutions. "School" can also mean a group of people sharing a common doctrine or a group of fish swimming together. Additionally, "school" can be used as a verb , meaning to educate, teach, or train someone, or to defeat an opponent emphatically. Thus, "school" functions mainly as a noun but can also be used as a verb depending on context.