to organize and control (something); to succeed in doing or dealing with (something) (especially using help, tools, money etc)
be in charge, control
Cases of word usage
1) manage (a difficult person, situation etc) successfully (cope)
2) a group of people appointed, elected or chosen to give advice, make rules, carry out plans, manage affairs etc, especially of government (council)
3) (a country with a) government in which adult citizens freely elect their political representatives to manage public affairs (democracy)
4) to manage (a business, accounts etc) badly (mismanage)