leading edge

noun

1. Aeronautics. the edge of an airfoil or propeller blade facing the direction of motion.
2. something that is or represents the most advanced or innovative aspect of a field, activity, profession, etc.; forefront; vanguard: the leading edge of technology.

noun

1. the forward edge of a propeller blade, aerofoil, or wingCompare trailing edge
2. electrical engineering the part of a pulse signal that has an increasing amplitude
3. 1. the leading position in any field
   2. (as modifier)leading-edge technology