A list or A-list (??l?st?)n. Informal A list or group of the most admired or desirable people, as for a job or social gathering: a private party for Hollywood’s A list.A?-list? adj.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.