Small pieces of paper with pictures on them that you buy and put on letters or packages to show that you have paid to send them somewhere.
Stamps are important for sending letters and packages, and people collect them as a hobby.
Examples:
I need to buy some stamps to mail this letter.
She collects stamps from all over the world.
He stamps the envelope with a colorful stamp.
The little girl tries to eat the stamp on the letter.
I have a million stamps in my collection.
The stamp on the package shows a big bird.
To put your foot down hard on the ground.
When you stamp, it can make a loud noise and show that you are angry or want to get attention.
Examples:
He stamps his foot when he is mad.
The elephant stamps its feet and makes the ground shake.
She stamps her feet to make music.
The boy stamps his feet to make his mom listen.
The giant stamps and the whole town shakes.
I stamp my feet and everyone looks at me.