noun

1. a way, path, etc. between two points that avoids or is auxiliary to the main way; specif., an alternative highway route, as for skirting an urban area
2. a pipe or channel providing an auxiliary passage for gas or liquid, as that leading to the pilot light in a gas stove
3. Elec. shunt ()
4. 1. a surgical operation to provide passage for a fluid, as blood, around a diseased or blocked part or organ
      in full bypass operation
   2. such a passage

transitive verb

1. to go around instead of through; use a bypass to avoid
2. to furnish with a bypass
3. to ignore, fail to consult, etc.