(in the UK) a written notice, underlined three times to denote urgency, to members of a political party to attend a parliamentary vote.
（英）紧急指令（通知政党成员出席议会投票的书面通知，下面划有三道底线表示紧急）
Example sentencesExamples
Had all Conservative MPs obeyed the party three-line whip against the government, victory may have been narrow enough to call into question the premiership of Tony Blair.
Local councillors are almost powerless, and even the best constituency MP is unlikely to rock the boat against a three-line whip in Parliament.
Obviously there will be times when a three-line whip will called and MPs will be expected to toe the party line.
A member who defies a three-line whip runs the risk of having the party whip withdrawn; this is tantamount to expulsion from the party.
Failure by MPs to attend a vote with a three-line whip is usually seen as a rebellion against the party and may eventually result in disciplinary action, such as suspension from the parliamentary party.
This legislation is top of the Government's list of priorities, and three-line whips will be used to try to get it through unamended before the election.