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Definitions

UFO

[yoo-ef-oh, yoo-foh] / ˈyuˈɛfˈoʊ, ˈyu foʊ /


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 Procure Space exchange-traded fund, which trades under the symbol UFO, was more than 20% above its 50-day moving average, coming into Monday trading.

From Barron's • Jun. 1, 2026

If the UFO were to fall below its 50-day moving average, it would be about 25% above its 200-day moving average.

From Barron's • Jun. 1, 2026

To see just how far ETFs have drifted from the investment mainstream, look at the Tuttle Capital UFO Disclosure ETF.

From The Wall Street Journal • May 22, 2026

If Spielberg’s earlier UFO movies gave us awe, comfort and catastrophe, this one feels like an encounter of a fourth kind: What happens when the cover story breaks?

From Los Angeles Times • May 14, 2026

Julia was standing with them, trying again to convince Jay about her stupid tinfoil UFO and how it was going to fly up and down the street on a stupid invisible wire.

From "When You Reach Me" by Rebecca Stead




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