nouns
the back of a military formation or procession
"infantrymen were in the rear"
domain category
the military forces of a nation
"their military is the largest in the region"; "the military machine is the same one we faced in 1991 but now it is weaker"
is a type of (narrower)
an arrangement of people or things acting as a unit
"a defensive formation"; "a formation of planes"
the side of an object that is opposite its front
"his room was toward the rear of the hotel"
the part of something that is furthest from the normal viewer
"he stood at the back of the stage"; "it was hidden in the rear of the store"
the fleshy part of the human body that you sit on
"he deserves a good kick in the butt"; "are you going to sit on your fanny and do nothing?"
arse,
ass,
backside,
behind,
bottom,
bum,
buns,
butt,
buttocks,
can,
derriere,
fanny,
fundament,
hind end,
hindquarters,
keister,
nates,
posterior,
prat,
rear,
rear end,
rump,
seat,
stern,
tail,
tail end,
tooshie,
tush
the side that goes last or is not normally seen
"he wrote the date on the back of the photograph"