noun A small particle of glowing matter, either molten or on fire, resulting from an electrical surge or excessive heat created by friction.
noun A short or small burst of electrical discharge.
noun A small, shining body, or transient light; a sparkle.
noun A small amount of something, such as an idea or romantic affection, that has the potential to become something greater, just as a spark can start a fire.
noun Any of various lycaenid butterflies of the Indomalayan genus Sinthusa.
noun (in the plural sparks but treated as a singular) A ship's radio operator.
noun An electrician.
noun A small collection of cells which briefly appears at the edge of a larger pattern before dying off.