Definition of nervous

• a. - possessing nerve; sinewy; strong; vigorous.
• a. - Possessing or manifesting vigor of mind; characterized by strength in sentiment or style; forcible; spirited; as, a nervous writer.
• a. - Of or pertaining to the nerves; seated in the nerves; as, nervous excitement; a nervous fever.
• a. - Having the nerves weak, diseased, or easily excited; subject to, or suffering from, undue excitement of the nerves; easily agitated or annoyed.
• a. - Sensitive; excitable; timid.