1 : an advantage held by a competitor in a race; "he took the lead at the last turn"
2 : the timing of ignition relative to the position of the piston in an internal-combustion engine
3 : a jumper that consists of a short piece of wire
4 : restraint consisting of a rope (or light chain) used to restrain an animal
5 : an actor who plays a principal role
1 : tend to or result in
2 : move ahead (of others) in time or space
3 : cause something to pass or lead somewhere
4 : lead, extend, or afford access
5 : be in charge of
6 : have as a result or residue
7 : preside over