Plain English Meaning
Full Definition
An in-flight impact between two aircraft. Midair collisions most often occur in clear daytime conditions, within five miles of an airport, below 3,000 feet AGL, and during the approach or departure phases of flight when traffic density is highest.
Context Anchor
Used in collision avoidance discussions, especially when pilots are scanning outside, listening for nearby traffic, and making decisions to keep clear of other aircraft.
Derivation
Midair means “in the middle of the air,” and collision comes from a Latin meaning “to strike together.” Together, the phrase points to aircraft striking each other while , not while parked or on the .