touch on/upon something phrasal verb (see also touch)
to mention a particular subject when talking or writing:
The report touches on the relationship between poverty and poor health.
These issues were touched on in Chapter 2.

[TahlilGaran] Dictionary of Contemporary English ▲

touch upon
• touch on/upon (something)
to speak or write briefly about something
The news article about the company touched on their previous legal problems.

[TahlilGaran] English Idioms Dictionary ▲

touch upon something
• touch on/upon (something)
to speak or write briefly about something
The news article about the company touched on their previous legal problems.

[TahlilGaran] English Idioms Dictionary ▲

touch upon
{v.} To speak of or write of briefly.
The speaker touched on several other subjects in the course of his talk but mostly kept himself to the main topic.
Contrast: DWELL ON.

[TahlilGaran] English Idioms Dictionary ▲