What does conversion in linguistics chiefly involve?

Conversion in linguistics chiefly involves the changing of a word's function and class, which refers to the process where a word shifts from one grammatical category to another without any alteration in form. For example, a noun can be converted into a verb, as seen in the transition of the word "bottle," which can function as a noun (a container) and a verb (to bottle something). This process allows for greater flexibility in language and enhances the ways in which words can be utilized in different contexts. It illustrates how dynamic languages can be, adapting existing words to serve new roles within sentences, thereby enriching communication.