If someone is called up, they are ordered to join the army, navy, or air force. Youngsters coming up to university were being called up The United States has called up some 150,000 military reservists. = draft
If someone is called up, they are chosen to play in a sports team. He is likely to be called up for Thursday's match against Italy see also call-up
an order to report for military duty bring forward for consideration; "The case was called up in court"
recall knowledge from memory; have a recollection; "I can't remember saying any such thing"; "I can't think what her last name was"; "can you remember her phone number?"; "Do you remember that he once loved you?"; "call up memories"
get or try to get into communication (with someone) by telephone; "I tried to call you all night"; "Take two aspirin and call me in the morning"