FluentPlex

lock

/lɑk/ noun A2
  1. Something used for fastening, which can only be opened with a key or combination.
  2. A mutex or other token restricting access to a resource.
  3. A segment of a canal or other navigable waterway enclosed by gates, used for raising and lowering boats between levels.
  4. The firing mechanism in a gun.
  5. Complete control over a situation.
  6. Something sure to be a success.
  7. Synonym of Dutch book.
  8. A player in the scrum behind the front row, usually the tallest members of the team.

Plural locks

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From the library

“By the Broken Lock that freed me, I am sure, Little Brother.”
The Jungle Book, p. 19 · B2
At last, about ten o’clock, and just as Dantès began to despair, steps were heard in the corridor, a key turned in the lock, the bolts creaked, the massy oaken door flew open, and a flood of light from two torches pervaded the apartment.
The Count of Monte Cristo, p. 70 · C1
She was dressed in green silk gauze and wore upon her flowing green locks a crown of jewels.
The Wonderful Wizard of Oz, p. 71 · B2
Why, sir, we have the man under lock and key.”
A Study in Scarlet, p. 58 · B2

Other matches

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Words, meanings, pronunciations and translations from Wiktionary (CC BY-SA 4.0); how common each word is from wordfreq. Made into this dictionary by FluentPlex.