noun

• (UK, slang) A police station.
  "The guys all knew each other and we were having a jolly old chinwag as we marched them out of the house in front of their stunned neighbours and into a van we had called to take them all to the Factory (police station)."
• (programming) In a computer program or library, a function, method, etc. which creates an object.
  "The task factory […] is the object that is responsible for creating instances of those tasks dynamically."
• (attributive) The original state of an electronic device, as it was when it came from the manufacturer.
  "factory settings; factory defaults; a factory reset"
• (chiefly Scotland, now rare) The position or state of being a factor.

adj

• (colloquial, of a configuration, part, etc.) Having come from the factory in the state it is currently in; original, stock.
  "See how there's another layer of metal there? That's not factory."