1. the amount that a teaspoon can hold

Examples

• Add a teaspoonful of vanilla extract to the mixture.
• The recipe calls for two teaspoonfuls of baking powder.
• She measured out a teaspoonful of medicine for her child.
• Mix in a teaspoonful of salt to enhance the flavor.
• The doctor prescribed one teaspoonful of cough syrup twice daily.
• A teaspoonful of honey will sweeten your tea naturally.