| blackbird |
a common songbird, the males of which are black or mostly black. Crows and grackles are blackbirds. |
| blackboard |
a smooth, hard panel for writing on with chalk; chalkboard. Blackboards are often made of slate and have a dark color. |
| blackboard eraser |
an object made of layers of felt used for erasing chalk from a blackboard. |
| blacken |
to make black; make dark. [3 definitions] |
| black eye |
bruised skin around the eye, often caused by being hit. |
| black hole |
a region or body in space with gravity so strong that neither light nor matter can escape it. Scientists believe that black holes form when very large stars collapse. |
| blackmail |
money demanded from someone by another person who threatens to give out information that would harm that person. [3 definitions] |
| blackout |
the loss or hiding of all the lights of a city or region. Cities may have blackouts because of power failures. [2 definitions] |
| black out |
to faint or pass out. |
| Black Sea |
a sea that lies between Europe and Asia. It is surrounded by Russia, Ukraine, Georgia, Turkey, Bulgaria, and Romania. |
| black sheep |
one who is very different from all the rest of his or her family and who is sometimes rejected or looked down on by that family. |
| blacksmith |
a person who forges and shapes iron. Blacksmiths soften the iron with heat and use hammers and anvils to form it into various items. |
| blacktop |
a substance such as asphalt, used as pavement. [2 definitions] |
| black widow |
a small spider of North and South America. The female has a shiny, black body with a red mark on her underside and a poisonous bite. |
| bladder |
an organ inside the body that collects urine. The bladder gets larger when it fills and smaller when it becomes empty. |
| blade |
the cutting part of a knife, sword, scissors, or saw. [4 definitions] |
| blame |
to place responsibility on for a mistake or fault. [3 definitions] |
| blank |
without marks or writing. [6 definitions] |
| blanket |
a thick piece of material used on a bed for warmth or worn as clothing. [3 definitions] |
| blare |
to sound loudly and harshly. [2 definitions] |
| blast |
a powerful and sudden gust or stream. [6 definitions] |