Having a high octane number and thus reducing knock and increasing efficiency in high-performance engines: high-octane gas.
Slang High-powered; dynamic: a high-octane sales manager; a high-octane marketing plan.
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.