Overcorrection vs. Hypercorrection — What's the Difference?

To correct beyond what is needed, appropriate, or usual, especially when resulting in a mistake.

In sociolinguistics, hypercorrection is non-standard use of language that results from the over-application of a perceived rule of language-usage prescription. A speaker or writer who produces a hypercorrection generally believes through a misunderstanding of such rules that the form is more "correct", standard, or otherwise preferable, often combined with a desire to appear formal or educated.Linguistic hypercorrection occurs when a real or imagined grammatical rule is applied in an inappropriate context, so that an attempt to be "correct" leads to an incorrect result.

To correct something to an excessive or unusual degree.

A construction or pronunciation produced by mistaken analogy with standard usage out of a desire to be correct, as in the substitution of I for me in on behalf of my parents and I.

The correction of something to an excessive degree.

The production of such a construction or pronunciation.

(linguistics) Nonstandard language use that results from the over-application of a perceived prescriptive rule.

(linguistics) A nonstandard form so used.