Source : WordNet®

logic gate
     n : a computer circuit with several inputs but only one output
         that can be activated by particular combinations of
         inputs [syn: {gate}]

Source : Free On-Line Dictionary of Computing

logic gate
     
        An {integrated circuit} or other device whose inputs and
        outputs represent {Boolean} or binary values as voltages
        ({TTL} uses 0V for False or 0, +5V for True or 1).  Different
        gates implement different Boolean functions: {AND}, {OR},
        {NAND}, {NOR} (these may take two or more inputs) {NOT} (one
        input), {XOR} (two inputs).  NOT, NAND and NOR are often
        constructed from single {transistor}s and the other gates made
        from combinations of these basic ones.  These functions are
        all {combinatorial logic} functions, i.e. their outputs depend
        only on their inputs and there is no internal state.  Gates
        with state, such as {latches} and {flip-flop}s, are
        constructed by feeding some of their outputs back to their
        inputs.
     
        (1995-02-08)