a small particle of a burning substance thrown out by something that is on fire or left among its ashes remaining when combustion is nearly completed
a hot glowing particle struck from a larger mass
a luminous disruptive electrical discharge of very short duration between two conductors of opposite high potential separated by a gas, e.g. air
an electrical discharge of this kind produced by a spark plug in an internal-combustion engine
a sparkle or flash
something that sets off or stimulates an event, development, etc
a trace, esp one which may develop; a germ
a spark of decency
informal
(in pl) a radio operator on a ship
(in pl) an electrician
[Old English spearca]