Bypass may refer to: Bypass (road), a road that avoids a built-up area (not to be confused with passing lane) Flood bypass of a river Science and technology Medicine Bypass surgery, a class of surgeries including for example: Heart bypass Gastric bypass Cardiopulmonary bypass Other Bypass capacitor, used to bypass a power supply or other high impedance component High bypass, a turbofan aircraft gas turbine engine Bypass duct Bypass ratio Bleach bypass, an optical effect Bypass switch, access port for an in-line active security appliance Bypass (telecommunications) Bypass valve A blowoff valve on a compressor A manual gas addition valve on a rebreather Other uses The Bypass, a 2003 short silent Bollywood film Railroad bypass, a new railroad line built to replace or supplement an existing route See also Pass (disambiguation)