<p><strong>Noun</strong></p><ul><li>a long, narrow mark, smear, band of color, or the like: streaks of mud</li><li>a portion or layer of something, distinguished by color or nature from the rest; a vein or stratum: streaks of fat in meat</li><li>a vein, strain, or admixture of anything: a streak of humor</li><li>Informal: a spell or run: a streak of good luck</li><li>an uninterrupted series: The team had a losing streak of ten games</li><li>a flash leaving a visible line or aftereffect, as of lightning; bolt</li><li>the line of powder obtained by scratching a mineral or rubbing it upon a hard, rough white surface, often differing in color from the mineral in the mass, and serving as an important distinguishing character</li><li>an elongated, narrow, superficial lesion on stems or leaf veins, becoming brown and necrotic; any disease characterized by such lesions</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>to mark with a streak or streaks; form streaks on: sunlight streaking the water with gold; frost streaking the windows</li><li>to lighten or color (strands of hair) for contrastive effect</li><li>to dispose, arrange, smear, spread, etc., in the form of a streak or streaks: to streak cold germs on a slide for microscopic study</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to become streaked</li><li>to run, go, or work rapidly</li><li>to flash, as lightning</li><li>to make a sudden dash in public while naked, especially as a prank</li></ul>