bald (bôld)adj. bald·er, bald·est 1. Lacking hair on the head.2. Lacking a natural or usual covering: a bald spot on the lawn.3. Lacking treads: a bald tire.4. Zoology Having white feathers or markings on the head, as in some birds or mammals.5. Lacking ornamentation; unadorned.6. Undisguised; blunt: a bald statement of policy.[Middle English balled, probably from bal, ball; see ball1. Sense 4, perhaps partly of Celtic origin; akin to Welsh bal, having a white streak on the forehead (of horses), Irish ball, spot, mark, and English blaze, white mark on the face of an animal; see blaze2.]bald?ly adv.bald?ness n.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.BaldnessSee also hair; head. acomiabaldness. Also called alopecia, phalacrosis. ? acomous, adj.alopecistMedicine. medical specialist who treats baldness.atrichiaMedicine. congenital or acquired baldness. Also atrichosis.calvities, calvitybaldness, especially at the top or back of the head. ? calvous, adj.peladophobiaa dread of baldness.phalacrosisbaldness.-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.