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

• concert grand
• concert hall
• concert piano
• concert pitch
• concert-goer
• concertante
• concerted
• concerted music
• concertina
• concertino
• concertise
• concertize
• concertmaster
• concerto
• concerto grosso
• concession
• concessionaire
• concessionary
• concessioner
• concessive
• conch
• concha
• conchfish
• conchoidal
• conchologist