Not to be confused with quartile Quadrant may refer to: Quadrant (instrument), a measuring instrument capable of measuring angles up to 90° In science-fiction: Galactic quadrants (Star Trek) HMS Quadrant (G11), a Second World War British/Australian warship A Quadrant or section in a city street nomenclature system Quadrant (automobile) Quadrant (motorcycles) Quadrant (magazine), an Australian journal Quadrant (software) - a tool for from Microsoft composing models and editing model d… (More on Quadrant)