Definition of "guesstimation" [guesstimation]

• An estimation made without good justification and often biased. (noun)
• Estimation based on guesses, usually for expedience or because no better method is available. (noun)

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• "My guesstimation is that since no production of e-book reader is necessarily involved in the process, there’s a good chance that Flat World Knowledge’s online textbooks are much better to the environment (more on this issue can be found on our e-books vs. paper books resource page)."
• "I also had a good idea of the kind of guesstimation that has passed for book-keeping at Pompey."
• "I realize that we all use naive "guesstimation" methods, along the lines of "10 years ago"