+A **jet** is a concentrated stream of fluid or gas expelled with force from a narrow opening. Often seen in nature as [Water](/wiki/water) gushing, or engineered for propulsion in a [Jet Engine](/wiki/jet_engine). Its power lies in directed flow.
+## See also
+- [Flow](/wiki/flow)
+- [Propulsion](/wiki/propulsion)
+- [Nozzle](/wiki/nozzle)
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