Pronunciation: (sum'un),[key] —v.t. 1. to call upon to do something specified.
2. to call for the presence of, as by command, message, or signal; call.
3. to call or notify to appear at a specified place, esp. before a court: to summon a defendant. 4. to authorize or order a gathering of; call together by authority, as for deliberation or action: to summon parliament. 5. to call into action; rouse; call forth (often. fol. by up): to summon all one's courage.