rotor
noun
ro·tor
| \ ˈrō-tər
\
\
Definition of rotor
1a
: a part that revolves in a stationary part
a brake rotor
b
: the rotating member of an electrical machine
2
: an assembly of rotating blades that supplies lift or stability for a rotorcraft
Examples of rotor in a Sentence
Recent Examples on the Web
James had been involved in an accident with a helicopter rotor blade. — San Diego Union-Tribune, "Column: Ride from the heart connects transplant recipient, family of fallen Navy officer," 29 July 2019 The aircraft was upside down with all five main rotor blades separated. — Dave Quinn, PEOPLE.com, "Helicopter Carrying Billionaire Chris Cline and 6 Others Crashed Just 1 Minute After Taking Off," 25 July 2019 All four tail rotor blades were separated, and one of the blades was not found. — Susannah Bryan, sun-sentinel.com, "NTSB: Helicopter carrying billionaire Chris Cline and 6 others was in air for 1 minute before fatal crash," 24 July 2019 The wide rubber enhances stopping power from the large four-wheel vented disc brakes, with 13.3-inch front rotors and 13-inch rear. — Mark Maynard, San Diego Union-Tribune, "2019 Audi A7 Sportback: a continental grand tourer," 26 July 2019 This means Dragonfly's rotors should be able to fly the vehicle around with relative ease. — Eric Berger, Ars Technica, "NASA will fund a revolutionary mission to fly through Titan’s atmosphere," 27 June 2019 The two rotors, which spin in opposite directions for stability, turn at 2,800 rpm, up to 10 times the speed of an ordinary helicopter. — Jonathon Keats, Discover Magazine, "The Origins of Flight, From Birds to Bugs to Planes," 21 June 2019 This fuselage is packed with rechargeable lithium-ion batteries that not only turn the two mighty rotors, but also provide heat to protect the copter’s electronics when nighttime temperatures dip to minus 130 degrees Fahrenheit. — Jonathon Keats, Discover Magazine, "The Origins of Flight, From Birds to Bugs to Planes," 21 June 2019 Specifically, Kaman may accelerate investment in the unmanned K-MAX helicopter platform and new composite rotor blades, Keating said. — Stephen Singer, courant.com, "Kaman to sell distribution business for $700M and focus on booming aviation markets," 26 June 2019These example sentences are selected automatically from various online news sources to reflect current usage of the word 'rotor.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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More Definitions for rotor
rotor
noun
English Language Learners Definition of rotor
technical
: a part of a machine that turns around a central point
See the full definition for rotor in the English Language Learners Dictionary
rotor
noun
ro·tor
| \ ˈrō-tər
\
\
Kids Definition of rotor
1
: the part of an electrical machine that turns
2
: a system of spinning horizontal blades that support a helicopter in the air