An example of to gratify means to give into a craving for a hot fudge sundae.
My good grades gratify my parents.
He gratified his curiosity by going to the exhibit.
Origin of gratify
- Middle English gratifien to favor from Latin grātificārī grātus pleasing gwerə-2 in Indo-European roots -ficārī -fy
From American Heritage Dictionary of the English Language, 5th Edition