Definition of tradecraft in US English:

tradecraft

noun

  • 1The art of practising a particular trade or profession; a person's skill in this.

  • 2Specifically slang. The art of espionage and intelligence work; the skills and techniques involved in this.

  • 3The art or skill of engaging in trading or commerce.

Origin

Early 19th century (in an earlier sense). From trade + craft.