When someone smooches, they kiss someone in a sweet and affectionate way.
Smooches are usually nice and make people feel happy and loved.
Examples:
Mommy smooches Daddy on the cheek.
The puppy gives smooches to the baby.
The cat smooches the dog on the nose.
The little girl smooches her teddy bear goodnight.
The prince and princess share smooches in the garden.
The movie ends with a big smooch between the two main characters.