Is aim a concrete or abstract noun?

"Aim" can be both a concrete and an abstract noun, depending on the context:

Concrete:

* When it refers to a physical object: "The archer adjusted his aim before releasing the arrow." Here, "aim" is the direction the arrow is pointed, which is a tangible thing.

Abstract:

* When it refers to a goal or purpose: "Her aim in life is to become a doctor." Here, "aim" represents a mental intention or ambition, which is intangible.

So, the answer depends on the specific usage of the word in a sentence.