Wiktionary
dying off
vb. (present participle of die off English)
Usage examples of "dying off".
The Plymouth Pilgrims, who were so well clothed on coming in, and were now dying off very rapidly, furnished many good suits to cover the nakedness of older, prisoners.
And the mindless things would continue, working and working, dying off and being replaced from their own self-created factory.
A high-pitched screaming echoed above the muted babble on the hearplugs, cresting, then dying off.