acronym of simulation.
"The flight sim allowed pilots to practice emergency landings without leaving the ground."
A Simeonite (follower of Charles Simeon).
Any of the characters in the video game The Sims, which simulates aspects of a human social environment.
A simulation or simulator.
In plain English: Sim is an old-fashioned term for someone who agrees with everything you say just to please you.
"I turned on my sim to get online quickly while traveling abroad."
A male given name, diminutive of Simon and Simeon.
"Sim is a common nickname that parents often choose for their sons named Simon or Simeon."
The word sim comes from Middle English as a diminutive form derived from the names Simeon and Simon. It originally functioned as an affectionate or small version of these biblical figures' names before evolving into its modern usage.