Definitions

1. noun

A substance containing potassium nitrate, used as a fertilizer or in the manufacture of gunpowder.

“The farmer applied niter to the fields to promote healthy plant growth.”

2. noun

A type of nitre, specifically potassium nitrate, used in the preparation of fireworks and other pyrotechnics.

“The pyrotechnician carefully mixed the niter with other chemicals to create a spectacular display.”