A committee is a group of members of either House that examines the detail of a bill and proposes amendments.
A group of members that meet regularly and look at bills in a particular area of a government's work.
Committee of the whole House
If the detail of a bill is examined by all members of a House of Parliament is called a committee of the whole House.
Working like this is common in the House of Lords. In the Commons it is reserved for very important laws, such as those that prevent terrorism.
If the committee believes the bill needs to be altered in some way they will suggest changes called amendments.
Amendments must be voted for by both houses.