(1):

(v. t.) To agitate the mind of; to deprive of tranquillity; to disquiet; to render uneasy; as, a person is disturbed by receiving an insult, or his mind is disturbed by envy.

(2):

(v. t.) To turn from a regular or designed course.

(3):

(v. t.) To throw into disorder or confusion; to derange; to interrupt the settled state of; to excite from a state of rest.

(4):

(n.) Disturbance.