Definition
To reduce or progressively diminish the amplitude of a vibration, oscillation, or movement. In aviation systems, damping absorbs unwanted motion energy so that an oscillation dies out rather than continuing or growing.
Plain English
To slow down or kill off a back-and-forth motion so it fades away instead of carrying on.
Context Anchor
Seen in aircraft stability, control movement, landing gear shimmy, instrument movement, and vibration discussions.
Derivation
From the Middle English 'dampen,' meaning to deaden or stifle. The aviation use keeps that idea: deadening a motion so it loses energy and fades.
Why Pilots Care
Adequate damping keeps the aircraft from developing large uncontrolled oscillations that could lead to loss of control or passenger discomfort.
Analogy
A car shock absorber dampens the bouncing of the car after it hits a bump. Without damping, the car would keep bouncing much longer.
Intuition Check
Do not read damp here as “slightly wet.” In this use, damp or dampen means to reduce motion, vibration, or swinging.
Example Sentence 1
The fluid inside the magnetic compass is there to damp the swinging of the compass card after a turn.
Example Sentence 2
Without proper damping the aircraft may continue pitching up and down after a gust.