What is Antioxidizing?

Antioxidizing definition and meaning on Dictionary terms:
verb (used with object), oxA.iA.dized,
to convert (an element) into an oxide; combine with oxygen.
to cover with a coating of oxide or rust.
to take away hydrogen, as by the action of oxygen; add oxygen or any nonmetal.
to remove electrons from (an atom or molecule), thereby increasing the valence.Compare reduce(def 12).

verb (used without object), oxA.iA.dized,
to become oxidized.
(especially of white wine) to lose freshness after prolonged exposure to air and often to darken in color.