standard time in the 6th time zone west of Greenwich, reckoned at the 90th meridian; used in the central United States
"The flight schedule listed our arrival in CST, reflecting the Central Time Zone observed across much of the United States."
Initialism of concrete syntax tree.
"The parser constructs an CST to represent the syntactic structure of the input code before generating the abstract syntax tree."
In plain English: CST is an abbreviation for Central Standard Time, which refers to the time zone used in parts of the central United States and Canada that are six hours behind Coordinated Universal Time during standard time.
"The train schedule shows that our arrival time is 3:00 cst in Chicago."
Initialism of Central Standard Time.
"When my friend called me at 9 a.m., I realized he was speaking CST, which is three hours behind my local Eastern time."