Highly or excessively active: a hyperactive thyroid gland. (adjective)
Having behavior characterized by overactivity.(adjective)
Having attention deficit disorder. Not in scientific use.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "hyperactive" in a sentence
"An excellent study in the prestigious medical journal Lancet found that children in general, and not just those suffering from attention deficit disorder (ADD) and attention deficit hyperactivity disorder (ADHD), can become more impulsive, inattentive, and hyperactive from the cocktail of artificial extras found in drinks, sweets, and processed foods."
"His insights came in hyperactive bursts between sips from a quart-sized plastic coffee mug."
"It’s fine roaming around the room in hyperactive fashion when its your own company (ala Steve Jobs) but it is not OK when you are a 25-year-old consultant to the CEO of a Fortune 50 company."