The univalent radical NO3 or a compound containing it, as a salt or an ester of nitric acid.
Fertilizer consisting of sodium nitrate or potassium nitrate.
tr.v.
ni·trat·ed, ni·trat·ing, ni·trates To treat with nitric acid or a nitrate, usually to change (an organic compound) into a nitrate. ni·tra'tion n., ni'tra'tor n.