Definition of jittery adjective from the Oxford Advanced Learner's Dictionary

 

jittery

 adjective
adjective
BrE BrE//ˈdʒɪtəri//
 
; NAmE NAmE//ˈdʒɪtəri//
 
(informal) Nervous
 
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anxious and nervous I felt jittery before going on stage. The election campaign got off to a jittery start. Just talking about it made her jittery. All this talk of war was making him jittery. Synonymsnervousneurotic on edge jitteryThese words all describe people who are easily frightened or are behaving in a frightened way.nervous easily worried or frightened:She was of a nervous disposition. See also the entry for worried.neurotic not behaving in a reasonable, calm way, because you are worried about something:She became neurotic about keeping the house clean.on edge nervous or bad-tempered:She was always on edge before an interview.jittery (informal) anxious and nervous:All this talk of job losses was making him jittery.Patterns a nervous/​neurotic man/​woman/​girl to feel nervous/​on edge/​jittery a bit nervous/​on edge/​jittery See related entries: Nervous Word Origin 1920s: of unknown origin.
See the Oxford Advanced American Dictionary entry: jittery