Determining or able to determine an outcome: the deciding factor; the deciding vote. (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 "deciding" in a sentence
"Barcelona find their Tuesday home leg between a late-night bruising encounter with the robust Athletic Bilbao Sunday, and a title deciding away encounter on Saturday with joint league leaders and bitter arch rivals -"
"But the bottom line is that if you think this ‘issue’ is a key factor in deciding who should be the next Governor, we truly do have different priorities."
"Where government has gone beyond its limits is in deciding to protect us from ourselves."