mindmap root((传唤)) summon implies the exercise of authority and may imply a mandate, an imperative order, or urgency: ~ed by the court to appear as a witness. call may be used less formally and less emphatically for summon: the President ~ed Congress for a special session. cite implies a summoning to court usually to answer a charge: ~d to answer the charge of drunken driving. convoke implies a summoning to assemble, especially for deliberative or legislative purposes: ~d an assembly of the world's leading scientists. convene is somewhat less formal or emphatic than convoke: ~d the students in the school auditorium. muster suggests a calling up of a number of things that form a group in order that they may be exhibited, displayed, or utilized as a whole for some purpose: ~ the troops for an inspection.