touch upon

mention a topic briefly without going into detail

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What does "touch upon sth" mean?

To touch upon something means to mention it briefly during a speech, lecture, report, or piece of writing, without examining it in any real depth. The phrase carries a built-in signal of incompleteness — the speaker is acknowledging that a topic exists, but deliberately choosing not to pursue it fully at that moment. This makes it particularly useful in formal contexts where a presenter or writer wants to flag relevant ideas without derailing the main line of argument. It often appears alongside words like 'briefly', 'only', or 'in passing', reinforcing the idea that coverage is intentionally limited. Native speakers sometimes use it to hint that a topic deserves fuller treatment than it is currently receiving.

Examples

How to use it

touch upon + noun phrase (topic/issue/concept)

The most common pattern: a specific topic, question, or issue follows directly after 'upon'. Full noun phrases work far better than pronouns here, as naming the topic is the whole point.

The report touches upon the long-term consequences of economic inequality without providing concrete recommendations.

touch upon + the issue/question/concept of + noun

This extended pattern is especially common in academic and professional writing, allowing a precise framing of the topic being mentioned.

The keynote speaker touched upon the question of intellectual property rights in the digital age.

touch upon + noun phrase + briefly / only / in passing

Adverbs such as 'briefly', 'only', or 'in passing' frequently accompany this phrasal verb to reinforce its inherent signal that coverage is limited.

The panel touched upon the ethical concerns only briefly, deferring a fuller discussion to a later session.

noun phrase + be touched upon + (in/during + context)

The passive is natural in formal written contexts, particularly when the focus shifts to the topic itself rather than the speaker or writer.

The implications of the new legislation were touched upon in the final chapter, though a thorough analysis was beyond the scope of the paper.

touch upon + several / a range of / various + plural noun

This pattern allows a speaker or writer to signal that multiple topics received brief mention, which is common in summaries and introductory remarks.

In her opening address, the director touched upon a range of operational challenges facing the organisation in the coming year.

Common Collocations

touch upon a topictouch upon the issue oftouch upon several pointstouch upon the question oftouch upon the implicationstouch upon briefly

Common Mistakes

Using 'touch upon' to imply thorough treatment

'Touch upon' always signals that coverage is brief and incomplete. Using it to describe detailed or comprehensive discussion is misleading and will confuse a reader or listener who expects only a passing mention.

✗ Chapter three touches upon the entire history of the movement, covering every major development.
✓ Chapter three touches upon the origins of the movement, with a fuller account provided in later chapters.
Avoiding continuous aspect

'Touch upon' is not naturally used in continuous tenses. Because it describes a momentary or point-like act of mention rather than an ongoing process, the progressive sounds unnatural.

✗ She was touching upon the issue of funding when the session ended.
✓ She touched upon the issue of funding just before the session ended.
Using a vague pronoun as the object

While grammatically possible, replacing the object with a pronoun like 'it' defeats the purpose of the phrasal verb, since naming the topic is what gives the sentence its meaning. Prefer full noun phrases.

✗ The presenter touched upon it briefly.
✓ The presenter touched upon the implications of the policy briefly.

Usage

Touch upon is formal and most common in academic writing, lectures, and professional presentations. In everyday conversation, 'mention' or 'bring up' sound more natural.

Frequently Asked Questions

Is 'touch upon' more formal than 'touch on'? Can I use them interchangeably?

'Touch upon' and 'touch on' mean exactly the same thing, but 'touch upon' has a slightly more elevated, literary, or academic feel. In everyday speech or informal writing, 'touch on' is the more natural choice. In formal essays, lectures, or professional reports, 'touch upon' is perfectly at home and often preferred.

Can I write 'touched briefly upon' — is it okay to put an adverb between 'touch' and 'upon'?

It is not ungrammatical, but placing the adverb between 'touch' and 'upon' tends to sound stilted. The smoother and more idiomatic option is to put the adverb after the full object: 'touched upon the matter briefly'. Keeping 'touch upon' together produces a more natural sentence.

Does 'touch upon' always have to have an object — can I use it without naming a topic?

'Touch upon' requires an object. Dropping the noun phrase entirely produces an incomplete and unnatural sentence. If you need to avoid repeating a topic that was just named, it is better to rephrase rather than use the phrasal verb without its object.

Can 'touch upon' be used in the passive, and is it common?

Yes, the passive is grammatically sound and does appear in formal writing, particularly in academic papers and reports. It typically sounds most natural when the topic itself — rather than the speaker — is the focus of the sentence, for example: 'Several key themes were touched upon in the introduction.'

Does 'touch upon' have any connotation beyond simply 'mention briefly' — does it imply anything about the speaker's attitude?

It can carry a slight nuance of restraint or deliberate understatement. Saying you 'touched upon' something can hint that you are aware the topic deserves more attention but were unable or unwilling to go further. This makes it useful in formal contexts where a speaker wants to signal awareness of a complex issue without committing to a full discussion.

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