The term LINE ON A GROCERY LIST is an ITEM that is written on a list of items to purchase at the grocery store. It is made up of four letters, and can be abbreviated as ITEM. A line on a grocery list is a single ITEM that is written down in order to remember to buy it when shopping. It is usually written in a specific order, such as by aisle or type of food. Lines on a grocery list are important for ensuring that all necessary items are purchased and nothing is forgotten.