1. The air or atmosphere surrounding the earth is often denoted by the word heaven; so "the fowls of heaven" means the birds of the air.

2. To "beat the air," and to "speak in the air," 1 Corinthians 9:26 14:9 , are modes of expression used in most languages, signifying to speak or act without judgment or understanding, or to no purpose. "The powers of the air," Ephesians 2:2 , probably means devils.