noun, verb, -passed or (Rare
) -past; -passed or -past; -pass⋅ing.| 1. | a road enabling motorists to avoid a city or other heavy traffic points or to drive around an obstruction. |
| 2. | a secondary pipe or other channel connected with a main passage, as for conducting a liquid or gas around a fixture, pipe, or appliance. |
| 3. | Electricity. shunt (def. 9). |
| 4. | a surgical procedure in which a diseased or obstructed hollow organ is temporarily or permanently circumvented. Compare coronary bypass, gastric bypass, heart-lung machine, intestinal bypass. |
| 5. | to avoid (an obstruction, city, etc.) by following a bypass. |
| 6. | to cause (fluid or gas) to follow a secondary pipe or bypass. |
| 7. | to neglect to consult or to ignore the opinion or decision of: He bypassed the foreman and took his grievance straight to the owner. |
| 1. | to shove or turn (someone or something) aside or out of the way. |
| 2. | to sidetrack; get rid of. |
| 3. | Electricity.
|
| 4. | Railroads. to shift (rolling stock) from one track to another; switch. |
| 5. | Surgery.
|
| 6. | to move or turn aside or out of the way. |
| 7. | (of a locomotive with rolling stock) to move from track to track or from point to point, as in a railroad yard; switch. |
| 8. | the act of shunting; shift. |
| 9. | Also called bypass. Electricity. a conducting element bridged across a circuit or a portion of a circuit, establishing a current path auxiliary to the main circuit, as a resistor placed across the terminals of an ammeter for increasing the range of the device. |
| 10. | a railroad switch. |
| 11. | Surgery. a channel through which blood or other bodily fluid is diverted from its normal path by surgical reconstruction or by a synthetic tube. |
| 12. | Anatomy. an anastomosis. |
| 13. | Electricity. being, having, or operating by means of a shunt: a shunt circuit; a shunt generator. |

by·pass also by-pass (bī'pās') n.
|
bypass by·pass (bī'pās')
n.
A passage created surgically to divert the flow of blood or other bodily fluid or to circumvent an obstructed or diseased organ.
A surgical procedure to create such a channel.
shunt (shŭnt)
n.
A passage between two natural body channels, such as blood vessels, especially one created surgically to divert or permit flow from one pathway or region to another; a bypass.
bypass (bī'pās') Pronunciation Key
(click for larger image in new window) A passage created surgically to divert the flow of blood or other bodily fluid or to circumvent an obstructed or diseased organ. |