Definition
A temporary flight restriction is an FAA-issued regulatory action that defines a specific block of airspace for a limited period of time within which flight is restricted or prohibited unless the pilot meets stated conditions. TFRs are issued by NOTAM and are used to protect persons or property on the ground or in the air, to provide a safe environment for disaster relief or special events, and to support national security or VIP movement.
Plain English
A TFR is a piece of airspace the FAA closes off, or limits who can fly through it, for a short period of time. It might be put in place over a wildfire, a sporting event, or wherever the President is travelling. If you fly into one without permission, you are breaking the rules.
Context Anchor
Pilots encounter TFRs during preflight planning, when checking current flight notices, reviewing a route, or looking at airport and area information before departure.
Derivation
Temporary means short-term. Flight restriction means a limit placed on flying. Together they describe a short-term limit on flying in a specific area. The word 'restriction' comes from the Latin 'restringere,' meaning to bind back or hold in — a useful image, since a TFR holds aircraft back from a defined piece of sky.
Why Pilots Care
Entering a TFR without authorization can trigger enforcement action, certificate suspension, or interception by military or law enforcement aircraft.
Analogy
A TFR is like a temporary road closure or controlled access zone, except it applies to airspace. Some traffic may still be allowed through, but only under the posted rules.
Intuition Check
Temporary does not mean optional or informal. Restriction does not always mean the airspace is completely closed; it means special limits apply and the pilot must check the exact conditions before entering.
Example Sentence 1
During his preflight briefing, the pilot discovered a TFR over the stadium for that afternoon's game and adjusted his route to remain clear of it.
Example Sentence 2
Wildfire activity created a large TFR that forced us to divert fifty miles north of our planned route.