Sedition is a term of law which refers to overt conduct, such as speech and organization, that is deemed by the legal authority as tending toward insurrection against the established order.
Sedition often includes subversion of a constitution and incitement of discontent (or resistance) to lawful authority. Sedition may include any commotion, though not aimed at direct and open violence against the laws.
Seditious words in writing are seditious libel.
Sedition is the stirring up of rebellion against the government in power.