a ‧ gi ‧ ta ‧ tion /ˌædʒəˈteɪʃ ə n, ˌædʒɪˈteɪʃ ə n/ BrE AmE noun
1 . [uncountable] when you are so anxious, nervous, or upset that you cannot think calmly:
She was in a state of considerable agitation.
2 . [uncountable and countable] public argument or action for social or political change
agitation for/against
mass agitation for political reform
3 . [uncountable] technical the act of shaking or mixing a liquid