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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.

A key issue is that many decisions are now made by automated or opaque systems.

From Science Daily • Apr. 5, 2026

This is where pharmaceutical logistics comes in -- a fast-growing sector in a world where key supply chains have been shaken by war, pandemic and trade chaos.

From Barron's • Apr. 5, 2026

People in Brenchley, Matfield, Pembury, Lamberhurst and surrounding villages lost their supply on Thursday morning after the fault on a key main from Bewl Water Treatment Works, in East Sussex.

From BBC • Apr. 4, 2026

She didn’t specify what mistake she made but said her apology was a key step in continuing to build trust with this team.

From Los Angeles Times • Apr. 4, 2026

“If I were Ella St. Clay and I wanted to protect each page, what better way than to entrust each key with the one person who lived through the story!”

From "The Way to Rio Luna" by Zoraida Cordova