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.
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.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012