Definitions
1.NounA thing whose name cannot be remembered; thingamajig, doohickey.
2.NounAny device or machine, especially one whose name cannot be recalled, often either clever or complicated."He bought a neat new gadget for shredding potatoes.; That's quite a lot of gadgets you have collected. Do you use any of them?"
3.NounAny consumer electronics product.
4.NounA sequence of machine code instructions crafted as part of an exploit that attempts to divert execution to a memory location chosen by the attacker.
5.NounA technique for converting a part of one problem to an equivalent part of another problem, used in constructing reductions."We reduce an instance of 3-SAT to an instance of bird-flock-optimization, using a gadget that converts each conjunctive Boolean clause to a group of birds."
6.NounA spring clip attached to the end of a punty in order to grasp the foot of a glass without leaving a bullion while finishing the bowl.