Subject

Primary focus of attention, thought, study, discussion, or action.

focus item

A subject refers to a person, object, concept, or entity that serves as the primary focus of attention, thought, study, discussion, or action within a particular context.

From Old French sujecter, from Latin subiciere (to place under), from sub- (under) + jacere (to lie, throw).

A subject is simply what you're focusing on, like when you study math in school or talk about your favorite hobby.

What is a subject? The primary focus of attention or study
Can a subject be an object? Yes, it can refer to a physical object being studied or discussed
What is the difference between subject and topic? 'Subject' implies a more focused and in-depth consideration than 'topic'

topic theme subject matter

entity concept

person object idea

sentence argument discussion

abstract concept legal term