Read the passage from "The Rockpile" below: Dozens of boys fought each other in the harsh sun: clambering up the rocks and battling hand to hand, scuffed shoes sliding on the slippery rock; filling the bright air with curses and jubilant cries. they filled the air, too, with flying weapons: stones, sticks, tin cans, garbage, whatever could be picked up and thrown. . . What does the word jubilant mean?