- That which serves to catch, deflect, or otherwise separate energy, particles, waves, signals, signal components, or the like. For example, and ion trap, or a sound trap.
- An entity or mechanism in a semiconductor which serves to capture electrons, or an impurity or lattice defect which cancels holes.
- A resonant circuit which is connected in series or in parallel with an antenna receiving system to help suppress unwanted signals at a given frequency. Also called wave trap.
- A mechanism or program which detects specified computer actions, processes, or conditions, such as those resulting in errors.
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