Definitions for "Official Opposition"
The party having the second largest number of seats in the Assembly. Known officially as Her Majesty's Loyal Opposition.
the members of the party that has the largest number of seats in the House of Commons and is not in government. The leader of this party is recognized as the Leader of the Official Opposition. The official opposition and all other parties and independents in the House of Commons that are not in government constitute the opposition.
The party with the second highest number of members elected. It is their job to study government legislation, politics and programs and offer alternatives.