Amotion means removal or turning out. It can be eviction of a tenant or removal from a post or an office. In corporate law, amotion refers to the act of removing an officer, or official representative, of a corporation from his/her office before the expiry of the term for which s/he was appointed. But, the person may not be deprived of membership in the Corporation. It is the common law procedure available to shareholders to remove a corporate director for a valid reason.
Amotion also means deprivation of possession, like the wrongful taking of personal property. Ouster is an amotion of possession.