subject

a branch of knowledge

“teachers should be well trained in their subject”

cause to experience or suffer or make liable or vulnerable to

“He subjected me to his awful poetry”

one of the two main constituents of a sentence; the grammatical constituent about which something is predicated

likely to be affected by something

“the bond is subject to taxation”

the first term of a proposition

make accountable for

“He did not want to subject himself to the judgments of his superiors”

possibly accepting or permitting

“the time is fixed by the director and players and therefore subject to much variation”

a person who owes allegiance to that nation

“a monarch has a duty to his subjects”

being under the power or sovereignty of another or others

“subject peoples”

make subservient; force to submit or subdue

the subject matter of a conversation or discussion

“he didn't want to discuss that subject”