tropical storm definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Meteorol. a tropical cyclone having winds that move slower than a hurricane (73 mph) but faster than a breeze (31 mph)
tropical storm definition by American Heritage Dictionary
nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A cyclonic storm originating in the tropics and having winds ranging from 39 to 73 miles per hour (34 to 63 knots; 63 to 117 kilometers per hour).
tropical storm - Science Definition
A tropical cyclone having sustained surface winds between 39 and 73 mi (63 and 118 km) per hour. See Note at cyclone.