subject
nounUK /ˈsʌbdʒɪkt/
US /ˈsʌbdʒɪkt/
A subject is something you learn about at school.
Math is my favorite subject at school.
OTHER MEANINGS
2. The person or thing that does the action in a sentence.
In the sentence 'The dog runs,' the dog is the subject.
3. A person who is being studied or tested.
The scientists watched each subject carefully during the experiment.
4. Under the control or rule of someone else.
The king ruled over his subjects for many years.