order up verb 2exclamation 1forms 3 verb2 •To place an order for (something).I ordered up a plate of ribs for us. •To summon for military duty.His unit was ordered up last Tuesday. exclamation1 •Especially at restaurants, called when someone's food order is ready to be retrieved or served."Order up." She snatched another order ticket from the pickup window and shouted to the women in the kitchen. "Three pigs on a bun! Two fries!" — 2007 formsordered up · ordering up · orders up