Definition of the word touch upon

The phrase "touch upon" originated from the verb "touch" in Middle English around the 14th century. At that time, the word "touch" had a broader meaning that included not only physical contact but also the idea of approaching or coming close to something. Over time, "touch" began to be used metaphorically, particularly in the context of speaking or writing. To "touch upon" a subject meant to briefly mention or approach it in discourse, without fully developing or elaborating upon it. The phrase became more commonly used in the 17th century, particularly in the context of academic and scholarly writing. It remained relatively popular throughout the centuries, and its usage continued to expand to include other forms of communication, such as conversations and presentations. The origin of "touch upon" highlights the evolution of language and the way words can acquire new meanings and shades of meaning over time. While "touch" in its original, literal sense may seem narrow and specific today, its metaphorical use has given rise to a broader and more flexible phrase that still resonates with modern speakers.