had pioneered
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past perfectof pioneer.past perfect
Used to express a completed action that took place before another specific past action occurred.
pioneernouna person who is among those who first enter or settle a region, thus opening it for occupation and development by others.
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.
Researchers at MIT and Stanford had pioneered work on carbon capture and enhanced oil recovery.
From Salon ● Jun. 26, 2026
Although British New Wave bands had pioneered the use of the music video as an art form, Michael Jackson was one of the first Black artists to be given the chance to do the same.
From The Wall Street Journal ● Feb. 1, 2026
In the 1990s, England and Wales, under pressure over coerced confessions, had pioneered an interrogation method that forbids lying and relies on open-ended questioning.
From Los Angeles Times ● Dec. 23, 2024
The move was followed by an unusual drop in subscribers that startled investors and intensified concerns that Netflix was losing dominance over the industry it had pioneered.
From BBC ● Apr. 18, 2024
He believed the Rad Lab was destined to face inevitable decline as physics progressed and competitive laboratories emerged—many of them built on the model Lawrence had pioneered.
From "Big Science" by Michael Hiltzik
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