Expert Answers
pohnpei397 eNotes educator| Certified Educator

If something is off topic it is not related to the subject or topic that it is supposed to be discussing.

There are a number of different situations where you might encounter this phrase, but it basically always means the same thing.  For example, if I assign a student to write an essay on freedom of speech and he starts to write about how the US government is spending too much money, I will tell him this is off topic.  He was supposed to write about freedom of speech, not about how much the government is spending.  Someone can also introduce a subject that is off topic in an oral discussion.

philipsteele | Student

yea, Mr.pohnpei397 said it with detailed..i am also agree withi his topic means it is completely out of desired topic. If yoiu are assigned to write about a global warming and you are started to write about faorite musical shows, it is said to be off is completely another i hope you understood what i meant...