Dorothy summons the Winged Monkeys. When the finally come she tells them to carry her and Toto home. But they explain they can't cross the desert surrounding Oz. One of the soldiers tells Dorothy that Glinda, the Good Witch of the South, may be able to help. So Dorothy and her friends begin their journey to see Glinda. On the way, the Lion defeats a giant spider. It was terrorizing the animals in a forest. They ask him to become their king. He agrees
to return after helping Dorothy. Dorothy calls the Winged Monkeys again to fly them over the hill to Glinda's castle. Glinda greets them. She reveals that Dorothy's silver shoes can take her anywhere she wishes to go. She embraces her friends. Dorothy takes Toto in her arms. She knocks her heels together three times and wishes to return home. Instantly, she begins whirling through the air. Soon rolling on the grass of the Kansas prairie. She runs to Aunt Em, saying, "I'm so glad to be home again!"
What is the meaning of summons as it is used in the passage?