to call upon to do something specified.

to call for the presence of, as by command, message, or signal; call.

to call or notify to appear at a specified place, esp. before a court

to summon a defendant.

to authorize or order a gathering of; call together by authority, as for deliberation or action

to summon parliament.

to call into action; rouse; call forth (often. fol. by up )

to summon all one's courage.

verb

dismiss , send away

verb

arouse , ask , assemble , beckon , beep , bid , call , call back , call for , call forth , call in , call into action , call together , call upon , charge , cite , command , conjure , convene , convoke , direct , draft , draw on , enjoin , gather , hail , invite , invoke , mobilize , motion , muster , order , petition , rally , recall , request , ring , rouse , send for , sign , signal , subpoena , toll , cluster , collect , congregate , get together , group , round up , draw , educe , elicit , beck , evoke , notice , page , warrant