Final answer:
The term gutter refers to the blank space between two columns of text in design, and is used to enhance readability and design aesthetics.
Step-by-step explanation:
The term gutter does indeed refer to the blank space that is often found within a grid layout, specifically between two columns of text. In design terms, it's a crucial element that provides visual separation, which enhances readability and aesthetic appeal. For example, when reading a document, the gutter space allows your eyes to easily distinguish between columns and follow the text without confusion.
In LibreTexts, you might find that in the column closest to the gutter, there are translations of Latin words into Anglo-Norman French, as Ron mentioned. This is a practical use of the gutter space, where annotations or additional information can be placed without disrupting the main text flow.