When to seek medical advice. 1  You experience bleeding or severe pain after an injury. 2  Bone or tendons are exposed. 3  The knee is visibly out of place. 4  There's sudden swelling or redness.  You can't bend your knee or put weight on it.
subject definition, subject meaning | English dictionary. subject. a the predominant theme or topic, as of a book, discussion, etc. 4 a person or thing that undergoes experiment, analysis, treatment, etc. 5 a person who lives under the rule of a monarch, government, etc.
In English grammar, a subject is one of the two main parts of a sentence. (The other main part is the predicate .). The subject is sometimes called the naming part of a sentence or clause. The subject usually appears before the predicate to show (a) what the sentence is about, or (b) who or what performs the action.n English grammar, a subject is one of the two main parts of a sentence. (The other main part is the predicate .). The subject is sometimes called the naming part of a sentence or clause. The subject usually appears before the predicate to show (a) what the sentence is about, or (b) who or what performs the action.