subject (EN)

noun, adjective, verb

noun “subject”

1. the person or thing being discussed or described
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   They changed the subject when he entered the room.
2. an area of knowledge studied in school, college, or university
   His favorite subject at university is history.
3. a person under the rule of a monarch or government
   The queen addressed her subjects during the ceremony.
4. (grammar) the noun or pronoun that performs the action in a sentence
   In "They are studying", "they" is the subject.
5. a person or animal being observed or experimented on
   Each subject in the study was given a questionnaire.
6. (music) the main theme or melody in a piece of music
   The violin introduces the subject in the second movement.

adjective “subject”

1. (with "to") likely to be affected by something
   Some plants are subject to disease in damp conditions.
2. (with "to") depending on or conditional upon something
   The project is subject to your approval.
3. (with "to") under the authority of something
   The contract is subject to labor laws.

verb “subject”

1. (usually with "to") to cause someone or something to experience something, often unpleasant
   The patients were subjected to a series of tests.
2. to bring under control or authority; to conquer
   The king wanted to subject the entire region under his rule.