b home Robert S. Johnson bubble bub⋅ble [buhb-uhl] –noun 1. a nearly spherical body of gas contained in a liquid. 2. a small globule of gas in a thin liquid envelope. 3. a globule of air or gas, or a globular vacuum, contained in a solid. 4. anything that lacks firmness, substance, or permanence; an illusion or delusion. 5. an inflated speculation, esp. if fraudulent: The real-estate bubble ruined many investors. 6. the act or sound of bubbling. a b c d e f g h i j k l m n o p q r s t u v w x y z breeze breath brick bride buffalo bridge broken browse bubble brush brother bruise bul-bz