<p><strong>Noun</strong></p><ul><li>an ignited or fiery particle such as is thrown off by burning wood or produced by one hard body striking against another.</li><li>Electricity. the light produced by a sudden discontinuous discharge of electricity through air or another dielectric.</li><li>the discharge itself.</li><li>any electric arc of relatively small energy content.</li><li>the electric discharge produced by a spark plug in an internal-combustion engine.</li><li>anything that activates or stimulates; inspiration or catalyst.</li><li>a small amount or trace of something.</li><li>a trace of life or vitality.</li><li>Slang. a radio operator on a ship or aircraft.</li><li>(usually initial capital letter) a member of Camp Fire, Inc., who is five years of age.</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to emit or produce sparks.</li><li>to issue as or like sparks.</li><li>to send forth gleams or flashes.</li><li>(of the ignition of an internal-combustion engine) to function correctly in producing sparks.</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>to kindle, animate, or stimulate (interest, activity, spirit, etc.): These bright students have sparked her enthusiasm for teaching.</li><li>The arrival of the piano player really sparked the party.</li></ul>