The phrase "emergency brake" refers to a special lever or pedal in a vehicle that can be used to stop the car quickly in an emergency situation, such as if the regular brakes fail or if there's a need to stop suddenly. Full definition
It comes equipped as standard with autonomous emergency braking with pedestrian recognition, seven airbags and lane keeping alerts. (autoexpress.co.uk)
And a viewer question on automatic emergency braking systems. (motorweek.org)
Electronic assistance comes from forward collision warning with autonomous emergency braking with a blind spot monitor, lane departure warning and adaptive cruise control. (carbuzz.com)