base
noun
the bottom support of anything; that on which a thing stands or rests.
had been basing
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past perfect progressiveof base.past perfect progressive
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Prof Andrew Hill wrote a positive review of anti-parasite drug ivermectin for treating Covid but reversed his stance once he discovered data he had been basing his conclusions on was untrustworthy.
From BBC ● Oct. 13, 2021
