ozone UK /ˈəʊzəʊn/US /ˈoʊzoʊn/noun 2verb 1forms 3 noun2 •An allotrope of oxygen (symbol O₃) having three atoms in the molecule instead of the usual two; it is a toxic gas, generated from oxygen by electrical discharge.Lightning flashed again, the thunder came a second later. It rained harder. The smell of ozone was strong. You could feel the charge in the air. — 2018 •(UK, informal) Fresh air, especially that breathed at the seaside and smelling of seaweed.To Ramsgate baths she sped, in quest / Of seaweed and ozone ; / For seaweed and ozone were best, / They said, to give her tone. — 1888 verb1 •To treat with ozone.Whenever it exists, as it usually does, even where the tide water freshens at the ebb, it seems to have a purifying tendency, probably by ozoning the superincumbent atmosphere. — 1868 formsozoned · ozoning · ozones
