billow
noun
a great wave or surge of the sea.
had been billowing
-
past perfect progressiveof billow.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.
Then the wind shifted slightly, and the dense gray smoke that had been billowing harmlessly up the slope turned and engulfed me.
From Los Angeles Times ● Jun. 16, 2025
