1) (of a legislative assembly) having two separate groups of members e.g. the Senate and the House of Representatives in USA (bicameral)
2) (a country with a) government in which adult citizens freely elect their political representatives to manage public affairs (democracy)
3) (an instance of) the choosing of representatives (for a committee, government etc) (election)
4) the authority given to representatives by voters, members of a trade union etc (mandate)
5) (a country with) a system of government by elected representatives and with an elected head (the President) (republic)
a group of people appointed (usually by a larger group) to carry out special duties
group working on project
a confidence of members of a business, club, political party etc
conference
a separate part of the surface of a door, wall etc raised above or sunk below the surrounding area; a board or other surface for controls and instruments
committee