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.
late 15th century (in the general sense 'person to whom something has been entrusted'): from commit+ -ee
Spell committee with a double m, a double t, and a double e at the end.
committee in other Oxford dictionaries
Definition of committee in the US English dictionary