• Webster's Revised Unabridged Dictionary
    • v. t Overdate To date later than the true or proper period; to postdate.
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Century Dictionary and Cyclopedia
    • overdate To date beyond the proper period; cause to continue beyond the proper date.
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Chambers's Twentieth Century Dictionary
    • v.t Overdate ō′vėr-dāt to post-date.
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In poetry:

Now there comes catharsis, the cleansing downpour
Breaking the blossoms of our overdated fancies
Our old sentimentality and whimsicality
Loves of the morning.
"June Thunder" by Louis MacNeice

In news:

Belt of Vapor 's latest tome, EP, is a five-song shot of dark, surging guitars, overd EP,CD Review.

In science:

Shamir. Efficient algorithms for solving overdefined systems of multivariate polynomial equations.
A Generalized Criterion for Signature-based Algorithms to Compute Gr\"obner Bases
Materials are usually classified as underdoped, optimally doped and overd oped, with respect to the highest Tc in a given class.
Normal State Properties of Cuprates: t-J Model vs. Experiment