1. Be a substitute
   - substitute, stand in, fill in

1. [N. Amer] A large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States
   - bomber [US], grinder [US], hero [N. Amer], hero sandwich [N. Amer], hoagie [N. Amer], hoagy [N. Amer], Cuban sandwich [N. Amer], Italian sandwich [N. Amer], poor boy [N. Amer], submarine [N. Amer], submarine sandwich [N. Amer], torpedo [US], wedge [US], zep [N. Amer] 
2. A submersible warship usually armed with torpedoes
   - submarine, pigboat, U-boat

1. Under, lower, below, secondary, inferior
   - under-

Derived forms: subbing, subbed, subs

See also: subbing

Type of: change, exchange, interchange, sandwich, submersible, submersible warship

Encyclopedia: Sub

• macrocytic anemia
• macrocytosis
• Macrodactylus
• Macrodactylus subspinosus
• Macrodantin
• macroeconomic
• macroeconomic expert
• macroeconomics
• macroeconomist
• macroevolution
• macroglia
• macroglossia
• macromolecular
• macromolecule
• macron
• Macronectes
• Macronectes giganteus
• macrophage
• Macropodidae
• Macropus
• Macropus agiles
• Macropus giganteus
• Macrorhamphosidae
• macroscopic
• macroscopic anatomy