Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A turbojet engine in which a fan supplements the total thrust by forcing air directly into the hot turbine exhaust.
  • n. An aircraft in which a turbofan is used.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A turbojet engine having a (typically ducted) fan that forces air directly into the hot exhaust and obtains a portion of the thrust from the turbojet and a portion from the turbojet section.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. an airplane propelled by a fanjet engine
  • n. a jet engine in which a fan driven by a turbine provides extra air to the burner and gives extra thrust

Etymologies

turbo- +‎ fan (Wiktionary)

Examples

  • The new geared turbofan engines also must balance robustness with weight to actually cut fuel consumption.

    Bombardier Looks Like Flying Ace

  • Associated Press Above, a V2500 fan disk that is to be part of a Rolls-Royce turbofan engine.

    Rolls-Royce Retreats to Gain Ground

  • Called “one of the most coveted pieces of military technology in the world,” this $35 million remotely piloted aircraft is powered by a turbofan engine and is about the size of a fighter plane.

    6 Scary Unmanned Aerial Vehicles Used by the Military | Impact Lab

  • The two companies plan to work together in a new venture that will develop engines for future narrow-body aircraft using Pratt's geared turbofan technology.

    Pratt, Rolls-Royce Realign Ties

  • Last year, Pratt scored a coup when Airbus selected its geared turbofan engine as one of two engine options for the revamped A320.

    Pratt, Rolls-Royce Realign Ties

  • Increased engineering and development spending on its new geared turbofan engines caused margins at Pratt & Whitney to narrow.

    United Technologies Earnings Climb

  • Pratt, a unit of United Technologies Corp., has spent more than $1 billion over the past decade developing a new jet engine called the geared turbofan, which uses very different technology from engines offered by GE and Rolls.

    Pratt Revs Up Jet-Engine War

  • The company, owned by European Aeronautic Defence & Space Co. NV, is offering two engine choices: CFM's Leap-X, and the PW1100G geared turbofan from arch-rival Pratt & Whitney.

    CFM Gets Airbus A320 Engine Order

  • The company invested $1 billion to develop a new jet engine—the geared turbofan—in an attempt to get back into the single-aisle-jet business, but is off to a slow start after being frozen out of Boeing Co.'s plan to refresh its 737 jetliner.

    UTC Deal Reached to Acquire Goodrich

  • The submarine is powered by an enclosed set of propulsion blades at the stern resembling a turbofan jet engine.

    British nuclear sub forced back to base

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