What does "nitre" mean?

British standard spelling of niter.

Nitre

Common synonyms include: niter, potassium nitrate, saltpeter, saltpetre, nitre crust, nitre deposit.

noun

noun ·Rare ·Advanced level

Noun

1
British standard spelling of niter. countable, uncountable
"For though thou wash thee with nitre, and take thee much soap, yet thine iniquity is marked before me."
2
(KNO3) used especially as a fertilizer and explosive wordnet

"For though thou wash thee with nitre, and take thee much soap, yet thine iniquity is marked before me."