* Abstract nouns represent concepts, qualities, or ideas that cannot be touched or physically perceived. "Cultures" represents a broad idea of how different groups of people live and think.
* You can't hold "cultures" in your hand or see it with your eyes. You experience cultures through their expressions, such as traditions, art, language, etc.
Example:
* "The world is a tapestry of diverse cultures." (Here, "cultures" refers to the general concept of different ways of life.)
However, "cultures" can sometimes be a concrete noun if it refers to specific, identifiable groups of people with shared traditions.
Example:
* "He studied the cultures of the ancient civilizations." (Here, "cultures" refers to specific groups of people from the past.)
Therefore, the context is important to determine whether "cultures" is abstract or concrete.