noun
standard time in the 6th time zone west of Greenwich, reckoned at the 90th meridian; used in the central United States
• Syn: ↑Central Standard Time, ↑CST
• Hypernyms: ↑civil time, ↑standard time, ↑local time
* * *
the time at the line of ↑longitude 90°W, which is the standard time in the central US and Canada
Useful english dictionary. 2012.