If something is in the wind, people are talking about it and it may happen, but noone is sure.(某事)在酝酿中,在热论中
Rumours of a takeover are in the wind.有关接管的传言甚嚣尘上。
If someone is in the wind, they are missing, especially after escaping(某人)逃跑后失踪,消失
The suspects are in the wind.疑犯在逃失踪。