oxidation

Oxidation is the process when oxygen combines with an element, changing the appearance of the element. (noun)

When iron reacts with oxygen and changes to rust, this is an example ofoxidation.
When fire burns up a wooden log, this is an example of oxidation.

See oxidation in Webster's New World College Dictionary

noun

any process in which oxygen combines with an element or substance, either slowly, as in the rusting of iron, or rapidly, as in the burning of wood
the process of increasing the positive valence or of decreasing the negative valence of an element or ion
the process by which electrons are removed from atoms or ions

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See oxidation in American Heritage Dictionary 4

(ŏkˌsĭ-dāˈshən)

noun

The combination of a substance with oxygen.
A reaction in which the atoms in an element lose electrons and the valence of the element is correspondingly increased.

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