sub

Noun
  1. 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 (synset 107713570)
    is a type of: sandwich - two (or more) slices of bread with a filling between them
    same as: bomber, cuban sandwich, grinder, hero, hero sandwich, hoagie, hoagy, italian sandwich, poor boy, submarine, submarine sandwich, torpedo, wedge, zep
  2. A submersible warship usually armed with torpedoes (synset 104354832)
    is a type of: submersible, submersible warship - a warship designed to operate under water
    subtypes:
    has:
    • conning tower - a raised bridge on a submarine; often used for entering and exiting
    • escape hatch - hatchway that provides a means of escape in an emergency
    • periscope - an optical instrument that provides a view of an otherwise obstructed field
    • breather, schnorchel, schnorkel, snorkel, snorkel breather - air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time
    • asdic, echo sounder, sonar - a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return
    same as: pigboat, submarine, u-boat
Verb
  1. Be a substitute (synset 202263424)
    "The young teacher had to substitute for the sick colleague"; "The skim milk substitutes for cream--we are on a strict diet"
    is a type of: change, exchange, interchange - give to, and receive from, one another
    same as: fill in, stand in, substitute

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