nervous

adjective

1. 1

   unpredictably excitable (especially of horses)

2. 2

   excited in anticipation

3. 3

   easily agitated

   a nervous addict

   a nervous thoroughbred

4. 4

   causing or fraught with or showing anxiety

   spent an anxious night waiting for the test results

   cast anxious glances behind her

5. 5

   of or relating to the nervous system

   nervous disease

   neural disorder