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Definitions

key

[kee] / ki /


NOUN
item that unlocks
Synonyms
Antonyms




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.

It has also carried out strikes on luxury hotels, radar installations, energy facilities in multiple countries, key ports, U.S. embassies across the region, and even Amazon data centers.

From The Wall Street Journal • Apr. 4, 2026

In the process, oil and gas became key contributors to U.S. economic growth and prestige.

From The Wall Street Journal • Apr. 4, 2026

Scientists believe this offset is linked to two key factors.

From Science Daily • Apr. 3, 2026

But Coogan and Hays insist they are not journalists, even if they line up interviews with key figures in the industry who offer insightful access to the Silicon Valley world.

From Barron's • Apr. 3, 2026

“It’s seven fifty-four,” I said, and then I felt something in my brain click home like a key in a lock, and I turned to take in my surroundings with wide eyes.

From "Glitch" by Laura Martin