noun, noun which may take the genitive case particle 'no'
Refers to the rear part of a line, procession, vehicle, or formation. Often used in formal or written contexts.
Please line up at the rear of the procession.
I loaded luggage onto the back of the car.
end of a line; tail end; rear; backmost part
post-anal tail
Compound of 後 (こう, 'behind') and 尾 (び, 'tail'). The reading is on'yomi.