Off Topic vs. Of Topic – Which is Correct?
When you mean that a comment or discussion is unrelated to the subject, the correct expression is “off topic” (or the hyphenated adjective “off-topic”). “Of topic” is not a standard substitute in this context. Use “off topic” after linking verbs and commonly as an adverbial phrase in everyday English usage.
Off Topic or Of Topic – Which is Correct?
Off topic is the correct expression when something is unrelated to the subject being discussed. For example, if a meeting concerns marketing but someone begins discussing vacation plans, that comment is off topic.
Of topic is not a standard expression with this meaning. It usually results from confusing the preposition off, meaning “away from” or “outside,” with the preposition of, which commonly shows possession, connection, or description. Although the words of topic can appear next to each other in a longer grammatical phrase, such as “the importance of topic selection,” they cannot replace off topic.
The Best Trick to Remember the Difference
Use the away test: if the comment has moved away from the subject, choose off topic. The word off suggests separation or departure, as in “off the path” or “off course.” Therefore, a discussion that leaves its subject is off topic, never of topic.
| Word | Part of Speech | Meaning | Example |
|---|---|---|---|
| off topic | Adjective phrase or adverbial phrase | Unrelated to the subject under discussion | That question is off topic. |
| of topic | Not a standard substitute | Does not mean unrelated to the subject | Do not write “That question is of topic.” |
How to Use Off Topic
Off topic describes a remark, question, post, conversation, or discussion that does not relate to the main subject. It is common in casual conversation, classrooms, meetings, online forums, customer support, and professional writing. After a linking verb such as become, seem, or be, it is generally written as two words: The conversation is off topic.
When it directly modifies a noun before it, many style guides recommend the hyphenated form off-topic: an off-topic comment. Some publications may leave out the hyphen, especially when the meaning remains clear, but the hyphen makes the compound adjective easier to read.
Example 1: The moderator removed several off-topic comments from the discussion.
Example 2: Our meeting began to go off topic after the budget question was introduced.
Example 3: That is an interesting question, but it is slightly off topic for today’s presentation.
Etymology of the Phrase Off Topic
The phrase combines off, an Old English word associated with separation or departure, with topic, which comes through Latin and Greek roots related to a place or subject. In English, off topic developed as a figurative extension of moving away from a subject or discussion.
Related Concepts
Understanding prepositions, compound modifiers, and context makes the difference between off topic and of topic easier to remember.
- Prepositions: The preposition off can indicate separation or movement away, while of usually expresses relationship, possession, or association.
- Compound adjectives: When two words work together before a noun, a hyphen can clarify their combined meaning, as in an off-topic question.
- Context: A phrase can be grammatical in one context but incorrect in another. For example, “a list of topic categories” is grammatical, but “the comment is of topic” is not.
- Subject relevance: A statement is on topic when it directly relates to the subject and off topic when it does not.
Examples from Media and Literature
The expression off topic appears naturally in many kinds of communication, especially when speakers or writers discuss relevance and conversation structure.
- News coverage: During a televised political interview, a host may interrupt a response by saying that the speaker is going off topic.
- Online discussion: A forum moderator may label a post “off-topic” when it discusses a different product, event, or question from the one covered by the thread.
- Classroom dialogue: In a novel set in a school, a teacher might redirect students by explaining that their conversation has become off topic.
- Film and television: A character leading a workplace meeting may ask colleagues to save off-topic ideas for a later discussion.
- Literary criticism: An essay may describe a subplot as interesting but largely off topic to the book’s central argument.
Off Topic Synonyms
| Synonym | Definition |
|---|---|
| Irrelevant | Not connected with or useful to the subject being considered. |
| Unrelated | Having no meaningful connection with the main subject. |
| Tangential | Connected only indirectly to the central subject. |
| A digression | A temporary departure from the main subject. |
| Irrelevant to the discussion | A clear formal expression for something that does not relate to the current subject. |
Frequently Asked Questions
Question 1: Is “off topic” one word?
No. When used after a linking verb or as a phrase describing a discussion, it is normally written as two words: The comment is off topic. Before a noun, the hyphenated form off-topic is commonly used: an off-topic comment.
Question 2: Is “of topic” ever correct?
The sequence of topic may appear inside a larger grammatical phrase, such as “the selection of topic examples,” but it is not correct as a substitute for off topic. Do not write “The discussion is of topic” to mean that it is unrelated.
Question 3: What is the opposite of “off topic”?
The usual opposite is on topic. You can also use relevant, pertinent, or related to the subject.
Conclusion
Use off topic when a comment, question, or discussion is unrelated to the subject. Use off-topic before a noun, as in an off-topic remark. Of topic is not the correct expression for this meaning. Pro Tip: Choosing the standard phrase off topic helps your writing appear polished and professional.
