A spoonful is a small amount of food that you put into your mouth with a spoon.
You might hear people use this word when talking about feeding babies or children. A common expression is "a spoonful of sugar helps the medicine go down," which means that if you mix a little bit of something sweet like sugar into a yucky-tasting medicine, it'll be easier to swallow. But beyond those kinds of situations, "spoonful" is often used in more casual conversations about eating habits or cooking. For example, someone might say they ate a spoonful of jam with their toast, or that a recipe calls for two spoonfuls of chopped herbs.
The amount that a spoon will hold, either level or heaped.
