A slate or enamel board for writing on with chalk; a predecessor to a whiteboard.

To write or draw on a chalkboard.

(transitive, idiomatic) To attribute or account for something; to ascribe.

(physics) A nuclear reaction in which particles produced by the fission of one atom trigger fissions of other atoms. / (figuratively) A series of events, each one causing or influencing the next.

(sports) A competition to determine a champion, especially the final of a series of competitions. / The position of champion, or winner. / Defense or support of some cause.

(nautical) A short board or other seating, secured in a bridle of ropes, used to hoist a man aloft or over the ship’s side for painting and similar work.

(organic chemistry) That part of a molecule attached to some core structure; a radical.

(audio) To use auxiliary audio input in that manner.

The inedible parts of a grain-producing plant. / Straw or hay cut up fine for the food of cattle. / (figuratively) Any excess or unwanted material, resource, or person; anything worthless.

(intransitive) To use light, idle language by way of fun or ridicule; to banter. / (transitive) To make fun of; to turn into ridicule by addressing in ironical or bantering language; to quiz.