Plain English Meaning
The point something pivots around. Like the middle of a seesaw — the spot that stays still while the ends move up and down.
Full Definition
The fixed pivot point about which a lever rotates. In aircraft weight and balance, the fulcrum is the reference point (often the datum or a designated support point) from which moment arms are measured when calculating the effect of weight on balance.
Context Anchor
Seen in aircraft maintenance when studying levers, control mechanisms, tools, and basic mechanical advantage.