blue light (English, noun)
expansion: blue light (countable and uncountable, plural blue lights)
Senses:
topics: nautical
transport
glosses: A mixture of chemicals (including nitre, sulfur and antimony) used in the eighteenth and nineteenth centuries for night-time signaling and general illumination.
tags: countable
historical
uncountable
glosses: A New England federalist, who opposed the Anglo-American War of 1812; (loosely), a federalist.
tags: US
colloquial
countable
historical
uncountable
glosses: A flashing light, usually fitted to an emergency vehicle.
tags: countable
glosses: Used other than figuratively or idiomatically: see blue, light.
tags: countable
uncountable
Forms:
form: blue lights
tags: plural