Please tell me the meaning of these words? radical

parliament

revolution

checks and balances

tax

bankruptcy

Radical - A person who advocates fundamental political, economic, and social reforms by direct and often uncompromising methods

Parliament - a meeting or assembly for conference on public or national affairs

Revolution - an overthrow or reduction and the thorough replacement of an estimated government or political system by the people governed

Checks and balances - limits imposed on all branches of a government by vesting in each branch the right to amend or void those acts of another that fall within its purview

Tax - a sum of money demand from a person or business

Bankruptcy - utter ruin , failure

I just finished this lesson in school