1.
If you call someone up , you telephone them. ( mainly AM )
When I’m in Pittsburgh, I call him up...
He called up the museum...
Sometimes I’d even call up at 4 a.m.
PHRASAL VERB : V n P , V P n (not pron) , V P
2.
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
PHRASAL VERB : be V-ed P , V P n (not pron) , also V n P
3.
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.
PHRASAL VERB : be V-ed P
see also call-up