What does exclusive breastfeeding mean?

Exclusive breastfeeding means feeding your baby only breast milk, not any other foods or liquids (including infant formula or water), except for medications or vitamin and mineral supplements. source: https://www.cdc.gov/nutrition/infantandtoddlernutrition/definitions.html#:~:text=Exclusive%20breastfeeding%20means%20feeding%20your,to%20a%20food%20or%20drink.