1. to go straight ahead in the same direction

1. When he asked me the way to the cafeteria, I told him to follow his nose.

2. Just follow your nose until you get there; you can't miss it.

3. Turn left, then just follow your nose and you'll see the shop on your left.

2. to proceed without plan or reflection, obey one's instincts

1. Take a chance and follow your nose - you may be right!

2. You don't need my advice—just follow your nose.