Meaning of “nervous” - Learner’s Dictionary

nervous

adjective us uk /ˈnɜːvəs/
When you're nervous or frightened, it helps to breathe slowly and deeply.She looked calm but was feeling nervous inside.She was very nervous, but she remained outwardly calm.I was so nervous I felt quite sick.He was nervous on his first day at school.
WORRIED

B1 worried and anxious:

a nervous cough/laugh
She's very nervous about her driving test.
BODY [ always before noun ]

relating to the nerves in the body:

a nervous disorder

(Definition of “nervous” from the Cambridge Learner’s Dictionary © Cambridge University Press)