(1):

(a.) Sensitive; excitable; timid.

(2):

(a.) Possessing or manifesting vigor of mind; characterized by strength in sentiment or style; forcible; spirited; as, a nervous writer.

(3):

(a.) Having the nerves weak, diseased, or easily excited; subject to, or suffering from, undue excitement of the nerves; easily agitated or annoyed.

(4):

(a.) Of or pertaining to the nerves; seated in the nerves; as, nervous excitement; a nervous fever.

(5):

(a.) possessing nerve; sinewy; strong; vigorous.