steel trap

Noun steel trap has 2 senses

• steel trap(n = noun.cognition) - 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"
is a kind of acuity, acuteness, keenness, sharpness

• steel trap(n = noun.artifact) - a trap made of steel with a strong spring and sharp toothlike projections to hold the prey;
is a kind of trap