fleck (fl?k)n.1. A tiny mark or spot: flecks of mica in the rock.2. A small bit or flake: a fleck of dandruff.tr.v. flecked, fleck·ing, flecks To spot or streak: the path was flecked with sunlight.[Probably from Middle English flekked, spotted; akin to Old Norse flekkr, spot.]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.