backseat /ˈbækˈsiːt/ noun plural backseats
plural backseats
Learner's definition of BACKSEAT
[count]
: a seat in the back of something (such as a car)（汽车等的）后座
take a backseat
: to be or become less important, active, or powerful —
often + to退居幕后；居于次要地位