1 /kəˈmɪti/ [treated as singular or plural] a group of people appointed for a specific function by a larger group and typically consisting of members of that group:the housing committee [as modifier]:a committee meeting
(in the UK) a committee appointed by Parliament to consider the details of proposed legislation:there was much scrutiny in committee
(Committee of the whole House) (in the UK) the whole House of Commons when sitting as a committee.
2 /ˌkɒmɪˈtiː/ Law a person entrusted with the charge of another person or another person’s property.
chiefly US a person who has been judicially committed to the charge of another because of insanity or mental disability.