From The Collaborative International Dictionary of English v.0.48:
jumpstart \jump"start`\, Jump-start \Jump"-start`\, v. t.
1. To start (the engine of a motor vehicle) using a temporary
connection to supply electrical power from another vehicle
or another source of current; -- an emergency procedure
used when a vehicle's own battery has insufficient power
to start the vehicle normally.
Note: Cables used to transmit electrical current from one
vehicle to another for the purpose of jump-starting are
called jumper cables.
[PJC]
2. To provide a speedy start to (an activity) using the
assistance of some external impetus; to re-energize (an
activity proceeding sluggishly); -- accomplished by
application of a stimulus not normally used in the
activity. [Figurative]
[PJC]
From The Collaborative International Dictionary of English v.0.48:
jumpstart \jump"start`\, Jump-start \Jump"-start`\, v. t.
1. To start (the engine of a motor vehicle) using a temporary
connection to supply electrical power from another vehicle
or another source of current; -- an emergency procedure
used when a vehicle's own battery has insufficient power
to start the vehicle normally.
Note: Cables used to transmit electrical current from one
vehicle to another for the purpose of jump-starting are
called jumper cables.
[PJC]
2. To provide a speedy start to (an activity) using the
assistance of some external impetus; to re-energize (an
activity proceeding sluggishly); -- accomplished by
application of a stimulus not normally used in the
activity. [Figurative]
[PJC]
From The Collaborative International Dictionary of English v.0.48:
Jump-start \Jump"-start`\, n.
The action or event of jump-starting. For motor vehicles, the
jump-starting of an engine is also called a jump.
[PJC] Jump suit