A long, thin line or mark of a different substance or color from its surroundings. The artist added a streak of blue to the painting to create contrast.
A continuous period of specified success or luck. The team is on a winning streak, having won their last five games.
A tendency or characteristic, especially of a specified kind. He has a stubborn streak that makes him difficult to work with.
The color of the powder produced when a mineral is rubbed across an unglazed porcelain plate, used as a diagnostic property in mineralogy. Hematite has a reddish-brown streak that helps distinguish it from similar minerals.