Definition
An enclosed space within an aircraft structure that is separated from other spaces by walls, partitions, or bulkheads, used to house occupants, cargo, baggage, equipment, or systems components.
Plain English
A walled-off section inside an aircraft set aside for a specific purpose, such as carrying passengers, baggage, or equipment.
Context Anchor
Seen in aircraft manuals, checklists, loading instructions, and maintenance descriptions.
Derivation
From the Latin compartiri, meaning 'to share out' or 'to divide.' The word originally referred to dividing a larger space into smaller, defined sections — which is exactly what a compartment does in an aircraft.
Why Pilots Care
Correct compartment identification is critical for weight and balance calculations, fire suppression systems, and emergency egress procedures.
Intuition Check
Do not assume compartment only means the passenger area. In aviation, a compartment can be any separated space in the aircraft, including baggage, equipment, engine, or cabin areas.
Example Sentence 1
He checked the baggage compartment to confirm the load was within the placarded weight limit before takeoff.
Example Sentence 2
The flight attendant confirmed that all items in the overhead compartment were stowed correctly.