Pronunciation: [ɪz bˈak ɒv] (IPA) 
The phrase "is back of" consists of three words: "is," "back," and "of." In IPA phonetic transcription, "is" is spelled /ɪz/, "back" is spelled /bæk/, and "of" is spelled /ʌv/. When spoken, "is back of" can be pronounced as /ɪz bæk ʌv/. This phrase is commonly used to describe the physical location of something or someone, indicating that it is situated behind or at the rear of a particular object or area.
The phrase "is back of" is an idiomatic expression primarily used in American English, which indicates the physical location or position of something, often to describe the placement of an object or person in relation to another object or person. It implies that the subject is situated or located behind or at the rear of something or someone else.
This phrase can be used to describe the positioning of objects in a physical space, such as when one object is placed or located behind another. For example, if you say "The book is back of the shelf," it means that the book is positioned or placed at the rear side of the shelf, farther from the viewer's perspective.
Similarly, "is back of" can also describe the location of a person in relation to another person. For instance, if you state "John is back of Mary," it suggests that John is positioned or standing behind Mary, meaning he is physically farther from the viewer's perspective.
In summary, "is back of" is an idiomatic phrase that indicates the physical location or position of an object or person behind or at the rear of something else. It is commonly used to describe relative placement and is often employed in informal or colloquial contexts.
