Plain English Meaning
Measuring how big people are, how far they can reach, and how they fit into a space, so that aircraft cockpits and gear can be built to suit different body sizes.
Full Definition
The study and measurement of the human body's physical dimensions, proportions, and ranges of motion, used in aviation to design cockpits, controls, seats, and equipment that fit the range of pilots who will use them.
Context Anchor
Seen in human factors discussions about cockpit design, seat position, reach to controls, and visibility from the pilot seat.
Derivation
From Greek anthropos meaning 'human' and metron meaning 'measure.' So literally 'human measurement' — a useful reminder that the term is about fitting the aircraft to the body, not the body to the aircraft.