Learner's definition of NERVOUS
[more nervous; most nervous]
having or showing feelings of being worried and afraid about what might happen
She is/feels nervous about her job interview.
All this waiting is making me nervous.
He gave a nervous glance at the clock.
a nervous smile
Before the wedding the bride's father was a nervous wreck. [=he was extremely nervous]
often or easily becoming worried and afraid about what might happen
causing someone to feel worried and afraid
making someone nervous
always used before a noun
of or relating to the nerves in your body
caused by or affected by nerves
He walked around with a nervous twitch.
He had a nervous habit of pulling at his hair.
The boy has a lot of nervous energy.