What does the word controller mean?

Usage examples for controller

  1. Tom swung himself half out of the cab window beside the controller. – Tom Swift and his Electric Locomotive or, Two Miles a Minute on the Rails by Victor Appleton
  2. Up and to my office, where all the morning, and among other things Mr. Turner with me, and I did tell him my mind about the Controller his master and all the office, and my mind touching himself too, as he did carry himself either well or ill to me and my clerks, which I doubt not but it will operate well. – Diary of Samuel Pepys, Complete Transcribed From The Shorthand Manuscript In The Pepysian Library Magdalene College Cambridge By The Rev. Mynors Bright by Samuel Pepys Commentator: Lord Braybrooke
  3. For this Zinovieff, as all- mighty controller of the city's destinies, ... – The Red Conspiracy by Joseph J. Mereto
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