| biweekly |
occurring or appearing every two weeks. [3 definitions] |
| biyearly |
happening every two years or lasting two years; biennial. [2 definitions] |
| bizarre |
strikingly odd or unusual, esp. in appearance or behavior. |
| Bk |
symbol of the chemical element berkelium. |
| blab |
to reveal carelessly or indiscreetly. [4 definitions] |
| blabber |
to talk or say in a wordy, nonsensical, or indiscreet way. [2 definitions] |
| blabbermouth |
(informal) one who talks indiscreetly, esp. one who habitually reveals confidential information. |
| black |
of or pertaining to the color black, the color of the night sky. [13 definitions] |
| black-and-blue |
discolored or covered with discolorations from blood coagulated under the skin; bruised. |
| black and white |
print or writing considered as documentary evidence or binding proof. [2 definitions] |
| black-and-white |
in shades of black and white only, as a photograph or film. [3 definitions] |
| black art |
black magic; sorcery. |
| blackball |
to cast out, as from a group; ostracize. [3 definitions] |
| black bass |
any of several related North American freshwater game fishes. |
| black bear |
a North American bear, smaller than a grizzly bear, with thick black or brown fur. [2 definitions] |
| black belt |
the highest rank among practitioners of martial arts such as judo or karate. [3 definitions] |
| blackberry |
a berry, dark purple to black and composed of many large seeds. [2 definitions] |
| blackbird |
any of various common songbirds, the males of which are black or mostly black, such as the European thrush or the American red-winged blackbird. |
| blackboard |
a smooth, hard, dark-colored panel, often made of slate and suitable for writing on with chalk; chalkboard. |
| blackboard eraser |
an object made of bound layers of felt used for erasing chalk from a blackboard. |
| blackbody |
in physics, a hypothetical body that theoretically absorbs all radiant energy falling on its surface. |