mag

C1 · Advanced Countable noun Science Technical

n. a measure of how bright a star or planet is.

n. a clipping of magnitude, specifically referring to the brightness of a celestial object on a logarithmic scale.

“The star has a mag of 2.5, making it easy to see with the naked eye.”

“Astronomers noted that the supernova reached a peak mag of -4.0, briefly outshining every other object in the night sky except the moon.”

B2 · Upper Intermediate Countable noun Informal

n. a type of expensive, shiny metal wheel on a car.

n. an ellipsis of 'mag wheel', referring to automotive wheels originally made from magnesium alloy, now used for various alloy wheels.

“He spent all his savings on a new set of mags for his car.”

“The vintage sports car was restored to its original glory, complete with polished mags and period-correct racing tyres.”

C1 · Advanced Uncountable noun Science Technical

n. a short name for the metal magnesium, often used in car parts or science.

n. a clipping of magnesium, frequently used in industrial, automotive, or chemical contexts.

“The engine block is made of a mag alloy to keep the weight down.”

“The laboratory technician ordered a fresh supply of mag ribbon for the undergraduate combustion experiments.”