[geyt] 
noun, verb, gat⋅ed, gat⋅ing.| 1. | a movable barrier, usually on hinges, closing an opening in a fence, wall, or other enclosure. |
| 2. | an opening permitting passage through an enclosure. |
| 3. | a tower, architectural setting, etc., for defending or adorning such an opening or for providing a monumental entrance to a street, park, etc.: the gates of the walled city; the palace gate. |
| 4. | any means of access or entrance: The gate to stardom is talent. |
| 5. | a mountain pass. |
| 6. | any movable barrier, as at a tollbooth or a road or railroad crossing. |
| 7. | a gateway or passageway in a passenger terminal or pier that leads to a place for boarding a train, plane, or ship. |
| 8. | a sliding barrier for regulating the passage of water, steam, or the like, as in a dam or pipe; valve. |
| 9. | Skiing.
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| 10. | the total number of persons who pay for admission to an athletic contest, a performance, an exhibition, etc. |
| 11. | the total receipts from such admissions. |
| 12. | Cell Biology. a temporary channel in a cell membrane through which substances diffuse into or out of a cell. |
| 13. | Movies. film gate. |
| 14. | a sash or frame for a saw or gang of saws. |
| 15. | Metallurgy.
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| 16. | Electronics.
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| 17. | (at British universities) to punish by confining to the college grounds. |
| 18. | Electronics.
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| 19. | Metallurgy. to make or use a gate. |
| 20. | get the gate, Slang. to be dismissed, sent away, or rejected. |
| 21. | give (someone) the gate, Slang.
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| logic gate n. A mechanical, optical, or electronic system that performs a logical operation on an input signal. |
| logic gate
A device, usually an electrical circuit, that performs one or more logical operations on one or more input signals. Logic gates are the building blocks of digital technology. |
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 transistors 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-flops, are constructed by feeding some of their outputs back to their inputs.
(1995-02-08)