Plain English Meaning
The blinking box or highlight on the GPS screen that shows you which item you are about to change or pick.
Full Definition
On a GPS unit, a blinking on-screen marker that highlights the data field or menu item currently selected for editing or selection by the pilot. The flashing indicates that any input from the control knobs or keys will act on that field.
Context Anchor
Seen while using a panel-mounted GPS or other navigation unit, such as when selecting the nearest airport function or editing an airport identifier.
Derivation
Cursor comes from a Latin word meaning “runner.” On a screen, the cursor “runs” or moves from place to place to show where your next action will happen. Flashing means blinking on and off so your eye can find it quickly.
Why Pilots Care
Prevents the pilot from accidentally selecting the wrong airport or data field by making the active choice immediately visible.