How to Use master key in a Sentence

master key

noun
  • In other words, the ball is easy, the master key to the way out.
    — San Diego Union-Tribune, 30 June 2019
  • That is the master key to everything else.
    — Kurt Knutsson, FOXNews.com, 29 Mar. 2026
  • The document would prove to be his master key to building a new life.
    — Kyle Swenson, chicagotribune.com, 31 May 2018
  • Arredondo requests a master key and mentions the use of a sniper.
    — Rachel Clarke, CNN, 6 Nov. 2022
  • Your email is often the master key to your digital life.
    — Kurt Knutsson, FOXNews.com, 19 June 2026
  • The workers then opened the room door with a master key and put Liam inside.
    — Vivian Kwarm, New York Daily News, 25 Nov. 2024
  • The tech at the dealership had a master key and replaced the locking lugs.
    — Bob Weber, Star Tribune, 9 Oct. 2020
  • Think of it like accessing the master key before the safe door even closes.
    — Kurt Knutsson, FOXNews.com, 5 Apr. 2026
  • Marcano’s unit with a master key just minutes before she was last seen at the complex.
    — Fox News, 30 Sep. 2021
  • The trio from the opening scene enters a home, looking for the master key to the power plant.
    — Ashley Chervinski, refinery29.com, 28 June 2020
  • Using a master key, deputies entered the apartment and found a woman dead.
    — Angie Dimichele, Sun Sentinel, 3 Jan. 2023
  • The robber unlocks the office safe, which contains a master key.
    — Renee Dudley, ProPublica, 13 June 2024
  • In the most robberies, armed thieves target mail carriers’ master keys.
    — Laura Rodríguez Presa, Chicago Tribune, 8 Apr. 2023
  • Elation for the adult that finally had the master key to decipher her life.
    — Lizz Schumer, People.com, 29 Apr. 2025
  • Cops also reviewed the hotel’s key lock system and saw that a master key was used to enter the couple’s room.
    — Madeleine Marr, miamiherald, 31 Jan. 2018
  • Microsoft was then able to search its own logs for the master key that the hackers had obtained and block future access.
    — Joseph Menn, Washington Post, 15 Aug. 2023
  • If passports are the key to international travel, then who wouldn't want the master key that opens the most doors?
    — Jessica Poitevien, Travel + Leisure, 11 Oct. 2021
  • The robber makes a copy of the master key, which provides access to all of the landlord's buildings and apartments.
    — Renee Dudley, ProPublica, 13 June 2024
  • Crooks often are trying to get their hands on checks in the mail or a master key, which can open multiple blue mailboxes in an area.
    — Susan Tompor, Detroit Free Press, 16 Mar. 2023
  • The men used a master key to open mailboxes, according to the affidavit.
    — Sofia Saric, Miami Herald, 31 Dec. 2025
  • McCraw said that around this time, Arredondo was looking for a master key to the classroom doors.
    — Joyce Sohyun Lee, Washington Post, 17 July 2022
  • The government held on to the master keys and lent a pair to the medical establishment.
    — Charlotte Shane, Harper's Magazine, 14 Sep. 2022
  • More than $1,400 was stolen from the vault of a small town near Branson by someone with a master key.
    — Jonathan Shorman, Kansas City Star, 16 Jan. 2025
  • Police say Marcano was killed by a maintenance worker who had a master key to her apartment.
    — Skyler Swisher, orlandosentinel.com, 25 Jan. 2022
  • Gaining admin access to the hub was like getting a master key to any home that used Zipato’s tech.
    — Zoe Schiffer, Vox, 8 Aug. 2019
  • Nevertheless, an employee used a master key to enter the room and leave Payne there.
    — Martha Ross, The Mercury News, 26 Nov. 2024
  • At one point, Arredondo is seen on body camera sending another officer to get a master key.
    — Jim Vertuno and John Seewer The Associated Press, Arkansas Online, 13 Aug. 2025
  • After police opened the door with a master key, the man picked up part of a metal bed frame and started moving toward officers, Dixon said.
    — Dallas News, 22 June 2022
  • This visibility is a master key that can open all kinds of doors for black scientists to succeed, and for the world to benefit from their success.
    — Aj Willingham, CNN, 3 June 2020
  • The transit boss said his crews were also working on adding additional locks to train cabs, which are traditionally opened by a master key.
    — Evan Simko-Bednarski, New York Daily News, 26 Feb. 2025

Some of these examples are programmatically compiled from various online sources to illustrate current usage of the word 'master key.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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