Nervous \Nerv"ous\, a. [L. nervosus sinewy, vigorous: cf. F. nerveux. See Nerve.]

1. possessing nerve; sinewy; strong; vigorous. ``Nervous arms.'' --Pope.

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

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

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

Poor, weak, nervous creatures. --Cheyne.

5. Sensitive; excitable; timid.

Source: Webster's Revised Unabridged Dictionary (1913)