What is the meaning of on the wind?

Answer 1

This metaphor often appears as "written on the wind." It denotes something insubstantial, transitory, or ephemeral, and therefore worthless. For example:

His promises were written on the wind. (He didn't mean what he said.)

The long-sought-for truce between the two countries was written on the wind. (The truce didn't last long or wasn't effective.)

Answer 2

"On the wind" typically refers to something being carried or transmitted through the air by the wind. It can be used metaphorically to suggest a sense of movement, change, or influence.