Cyclone?

Has anyone else been wondering what hit Myanmar/Burma lately? Personally, I am not at all sure what a "Cyclone" is. Typically, every explanation is vague, or so detailed as to be useless. But I finally found one. Its a hurricane. All the names are regional, but they are the same sort of storm:

• "hurricane" (the North Atlantic Ocean, the Northeast Pacific Ocean east of the dateline, or the South Pacific Ocean east of 160E)
• "typhoon" (the Northwest Pacific Ocean west of the dateline)
• "severe tropical cyclone" (the Southwest Pacific Ocean west of 160E or Southeast Indian Ocean east of 90E)
• "severe cyclonic storm" (the North Indian Ocean)
• "tropical cyclone" (the Southwest Indian Ocean)