Definition
To proliferate is to multiply at a pace that feeds on itself: cells proliferate, weeds proliferate, and so do startups, streaming services, and conspiracy theories. The word descends from the Latin proles, 'offspring' — to proliferate is literally to keep bearing offspring, which is why it means compounding growth rather than mere increase. Each new instance is also a new source. What began as one is, suddenly, everywhere — and the speed itself is the story.
Examples
- Cheap sensors have proliferated, finding their way into everything from doorbells to farm soil.
- In warm, nutrient-rich water, algae proliferate until they crowd out other life.
- Misinformation proliferates fastest on platforms that reward sharing over accuracy.
Synonyms
multiply · mushroom · spread · burgeon · snowball
In TOEFL & IELTS
TOEFL biology passages use it for cell growth and invasive species; social-science texts for the spread of technologies and media. The noun is just as testable: 'nuclear proliferation' is a fixed phrase in readings on international politics. For IELTS essays on technology, 'smartphones have proliferated in the past decade' is a precise, high-band alternative to 'there are more and more'.