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Noun: steel trap
  1. A trap made of steel with a strong spring and sharp toothlike projections to hold the prey
  2. An acute intelligence (an analogy based on the well-known sharpness of steel traps)
    "he's as sharp as a steel trap"; "a mind like a steel trap"

Derived forms: steel traps

Type of: acuity, acuteness, keenness, sharpness, trap