Definition of: nervous

(nûr′vəs) adjective
1. Affected or caused by the condition or action of the nerves: nervous prostration.
2. Easily disturbed or agitated, owing to weak nerves; excitable; timid.
3. Abounding in nerve or nerve force; vigorous; sinewy; nervy; also, highly strung.
4. Terse; crisp, as literary style.
5. Of or pertaining to the nerves or nervous system. [<L nervosus sinewy]
—ner′vous·ly adverb
—ner′vous·ness noun