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.
Definition of theme for English Language Learners. : 1  the main subject that is being discussed or described in a piece of writing, a movie, etc. : 2  a particular subject or issue that is discussed often or repeatedly. : 3  the particular subject or idea on which the style of something (such as a party or room) is based.