Likely to develop in a desirable manner.(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 "promising" in a sentence
"Across the divide, La Dorada shrieked at him, her expression promising pain."
"For a title promising Manhattan, there sure is a lack thereof in the finished product."
"However, investigators do say they are following several strong and what they called promising leads."