1. A highway that passes around or to one side of an obstructed or congested area. 2. A pipe or channel used to conduct gas or liquid around another pipe or a fixture. 3. A means of circumvention. 4. An alternative passage created surgically to divert the flow of blood or other bodily fluid or circumvent an obstructed or diseased organ. 5. a coronary artery bypass; a gastric bypass. 6. To avoid (an obstacle) by using an alternative channel, passage, or route. 7. bypassed standard office procedures. 8. To channel (piped liquid, for example) through a bypass.
