Synonyms of 'die out'
▷ See die
1 vanishDictionary, disappear, fade (away)We used to believe that capitalism would soon die out.
Dinosaurs vanished from the earth millions of years ago.
The immediate threat has disappeared.
Civilizations do eventually decline and perish.
cease to exist
disappear from the face of the earth
vanish off the face of the earth
pass into oblivion
cark it (Australian, New Zealand, slang)
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Thesaurus for die out from the Collins English Thesaurus
If something dies out , it becomes less and less common and eventually disappears completely.