When something is in the air you can feel it and you know it is happening or will happen soon.
look at the new boss and all his plans. Change is in the air.
4 be in the air
a) if a feeling is in the air, a lot of people feel it at the same time :
There was a sense of excitement in the air.
b) to be going to happen very soon :
Change is in the air.
in the ˈair
felt by a number of people to exist or to be happening There's romance in the air.
Oxford Advanced Learner's Dictionary 9th edition © Oxford University Press, 2015
in the air
If something is in the air, you feel that it is happening or about to happen:
Love/Change/Spring is in the air.
Cambridge Advanced Learner's Dictionary - 4th Edition
© Cambridge University Press 2013