One that closely resembles another; a double.(noun)
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 "look-alike" in a sentence
"After a while, algorithms could mine those portraits for patterns for so-called look-alike models: What traits predicted whether someone was a likely donor to an environmental cause?"
"2. Henry Hub Natural Gas Last Day HH: Also known as the look-alike last day financial futures, these contracts represent 10,000 mmBtu and the futures settle on the last trading day for each contract month."
"Don't see how a Nerf gun could be considered a look-alike weapon."