Definition
A designated paved area at or near the approach end of a runway where pilots position the aircraft to perform pre-takeoff engine checks, control checks, and instrument checks before requesting takeoff clearance.
Plain English
A marked spot near the runway where pilots stop to test the engine and instruments before taking off.
Context Anchor
You encounter this after engine start, while taxiing for departure, before taking the runway.
Derivation
From 'run up,' meaning to bring the engine up to a higher power setting. The area is named for the action performed there — running the engine up to check it works correctly under load.
Why Pilots Care
Keeps engine checks from interfering with other aircraft, reduces prop blast hazards, and ensures the airplane is ready for flight before entering the runway environment.
Intuition Check
A run-up area is not just any open pavement near the runway. It is the place intended or commonly used for stopping and doing before-takeoff checks safely.
Example Sentence 1
After taxiing out, she pulled into the run-up area and set the parking brake to begin the engine checks.
Example Sentence 2
The airport diagram showed the run-up area at the hold-short line for runway 22.