Definition
In a turbine engine, one pair of blade rows consisting of a single row of rotating blades (a rotor) followed by a single row of stationary vanes (a stator). Each stage progressively raises the pressure of the air passing through the compressor before it reaches the combustion section.
Plain English
One squeezing step inside a jet engine's compressor. The spinning blades push the air, and the fixed vanes right behind them straighten it out and squeeze it a little more. A compressor is built from many of these steps stacked one after the other.
Context Anchor
Seen in turbine engine system descriptions, engine training, and maintenance discussions about airflow through the compressor.
Derivation
From Latin 'compressare' (to press together) and 'stage' meaning a step or stop along a process. The word 'stage' is used here in the same sense as a stage of a rocket -- one discrete step in a sequence that builds toward a final result.
Why Pilots Care
Knowing what a stage is helps you understand how a turbine engine builds pressure, why compressor stalls happen at certain stages, and why engineers describe engines as 'a 14-stage compressor' or similar. It connects directly to engine performance and abnormal-operation discussions.
Analogy
Think of several people passing a soft ball down a line, with each person squeezing it a little more. A compressor stage is like one person in that line: it adds one more squeeze before the air moves on.
Grounding Statement
Air enters the compressor at lower pressure, and each compressor stage raises that pressure before the air reaches the part of the engine where fuel is burned.
Intuition Check
Do not think of “stage” as a theater platform or just a vague phase. Here, a stage is a specific pressure-raising section inside the compressor.
Example Sentence 1
The first compressor stage takes in outside air, and each stage that follows raises the pressure further before the air reaches the burner section.
Example Sentence 2
Each additional compressor stage allows the engine to reach higher overall pressure ratios.