Meanings

back (of a chair)

horse's back

fighting with one's back to the wall

reading between the lines

act of disobedience (betrayal)

black-backed jackal (carnivore, Canis mesomelas)

you can't make an omelet without breaking eggs

top of the foot

one-armed shoulder throw (judo or sumo)

short (of a person)

tall (of a person)

spine (of a book)

reductio ad absurdum

breadth of the back

any bird of family Motacillidae (excluding the pipits)

latissimus dorsi muscle

you can't make an omelet without breaking eggs

stage scenery

to have one's feet reach the bottom (e.g. when standing in water)

to grow taller (of people)