Die out
/daɪ aut/B2
UpperIntermediate
1. To disappear completely due to the gradual decline in population or numbers.
- Many species are threatened to die out if their habitats aren't protected.
- The tradition of handwritten letters has largely died out with the advent of email and text messaging.
2. To cease to exist because something becomes obsolete or no longer needed.
- Gas lamps died out with the invention and widespread use of electric lighting.
- Silent movies died out once sound was incorporated into films.
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