What is the meaning of Reins?

plural of rein

third-person singular simple present indicative of rein

The kidneys.

The lower part of the back.

The loins.

The parts of a vault between the crown and the spring or abutment, including, and having especial reference to, the loading or filling behind the shell of the vault.

partitive of rein

plural of rein

small of the back; waist

small of the back; lower back

oblique plural of rein

nominative singular of rein

Source: wiktionary.org