Meaning : An acute intelligence (an analogy based on the well-known sharpness of steel traps).
Example :
He's as sharp as a steel trap.
A mind like a steel trap.
Meaning : A trap made of steel with a strong spring and sharp toothlike projections to hold the prey.
Steel trap ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Hindi. Steel trap ka matlab kya hota hai?