surface
noun
the outer face, outside, or exterior boundary of a thing; outermost or uppermost layer or area.
had been surfacing
-
past perfect progressiveof surface.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.
The investigatory documents released Tuesday also pointed to many leaders inside Metro being caught off-guard by a wheelset defect that had been surfacing more frequently before the derailment.
From Washington Post ● Feb. 28, 2023
