Subjects

noun

1. (grammar) In a clause: the word or word group (usually a noun phrase) that is dealt with. In active clauses with verbs denoting an action, the subject and the actor are usually the same.

   "In the sentence ‘The mouse is eaten by the cat in the kitchen.’, ‘The mouse’ is the subject, ‘the cat’ being the agent."

2. An actor; one who takes action.

   "The subjects and objects of power."

3. The main topic of a paper, work of art, discussion, field of study, etc.
4. A particular area of study.

   "Her favorite subject is physics."

5. A citizen in a monarchy.

   "I am a British subject."