jet

Etymology 1

Borrowed from French jet (“spurt”, literally “a throw”), from Old French get, giet, from Vulgar Latin *iectus, jectus, from Latin iactus (“a throwing, a throw”), from iacere (“to throw”). See abject, ejaculate, gist, jess, jut. Cognate with Spanish echar.

noun

1. A collimated stream, spurt or flow of liquid or gas from a pressurized container, an engine, etc.
2. A spout or nozzle for creating a jet of fluid.
3. (aviation) A type of airplane using jet engines rather than propellers.
4. An engine that propels a vehicle using a stream of fluid as propulsion.
   1. A turbine.
   2. A rocket engine.
5. A part of a carburetor that controls the amount of fuel mixed with the air.
6. (physics) A narrow cone of hadrons and other particles produced by the hadronization of a quark or gluon.
7. (dated) Drift; scope; range, as of an argument.
8. (printing, dated) The sprue of a type, which is broken from it when the type is cold.

verb

1. (intransitive) To spray out of a container.
2. (transitive) To spray with liquid from a container.
   Farmers may either dip or jet sheep with chemicals.
3. (intransitive) To travel on a jet aircraft or otherwise by jet propulsion
4. (intransitive) To move (running, walking etc.) rapidly around
5. To shoot forward or out; to project; to jut out.
6. To strut; to walk with a lofty or haughty gait; to be insolent; to obtrude.
7. To jerk; to jolt; to be shaken.
   1719, Richard Wiseman, Serjeant-Chirurgeon to King Charles II, Eight Chirurgical Treatises, London: B. Tooke et al., 5th edition, Volume 2, Book 5, Chapter 4, p. 78, A Lady was wounded down the whole Length of the Forehead to the Nose […] It happened to her travelling in a Hackney-Coach, upon the jetting whereof she was thrown out of the hinder Seat against a Bar of Iron in the forepart of the Coach.
8. To adjust the fuel to air ratio of a carburetor; to install or adjust a carburetor jet
   The cure is to jet the carburetor excessively rich so that the mixture will be correct at the top end, but this richens the curve throughout the RPM range. 1970, Bill Fisher, How to Hotrod Volkswagen Engines, page 30
9. (slang, intransitive) To leave; depart.
   Gotta jet. See you tomorrow.

adj

1. Propelled by turbine engines.
   jet airplane

Etymology 2

From Middle English get, geet, gete, from a northern form of Old French jayet, jaiet, gaiet, from Latin gagātēs, from Ancient Greek Γαγάτης (Gagátēs), from Γάγας (Gágas, “a town and river in Lycia”). Doublet of gagate.

noun

1. (mineralogy) A hard, black form of coal, sometimes used in jewellery.
2. (color) The colour of jet coal, deep grey.
   jet:

adj

1. Very dark black in colour.
   All the direct blacks require working in strong baths to give anything like black shades; they all have, more or less, a bluish tone, which can be changed to a jetter shade by the addition of a yellow or green dye in small proportions, which has been done in one of the recipes given above. 1901, Franklin Beech, The Dyeing of Cotton Fabrics: A Practical Handbook for the Dyer and Student
   She was an ash blonde with greenish eyes, beaded lashes, hair waved smoothly back from ears in which large jet buttons glittered. 1939, Raymond Chandler, The Big Sleep, Penguin, published 2011, page 23