When a single individual is separated out from a larger group, usually by being especially noticed or treated differently, that individual is being “singled out.” This expression has nothing to do with signalling.
Principal, transportation director among new South Washington County hires A south metro school leader who was singled out by her Minnesota peers for a national honor in 2009 has been named the new principal of Pine Hill Elementary School in Cottage Grove.
June 15, 2013 - Minneapolis-St. Paul Star Tribune
Placencia and Laughing Bird Caye in Belize Among the World's Top 100 Beaches Placencia is singled out for its access to Belize Adventures and Laughing Bird Caye for its Coral and Marine Life. (PRWeb June 13, 2013) Read the full story at http://www.prweb.com/releases/2013/6/prweb10822931.htm
June 13, 2013 - PRWeb
Backers of rate regulation aren't satisfied with health exchange President Obama singled out California last week for getting better-than-expected rates in its rollout of the health insurance overhaul for millions of consumers.
June 12, 2013 - Los Angeles Times