Balk v. i. : A ridge of land left unplowed between furrows, or at the end of a field; a piece missed by the plow slipping aside.

Balk v. i. : A great beam, rafter, or timber; esp., the tie-beam of a house. The loft above was called "the balks."

Balk v. i. : One of the beams connecting the successive supports of a trestle bridge or bateau bridge.

Balk v. i. : A hindrance or disappointment; a check.

Balk v. i. : A sudden and obstinate stop; a failure.

Balk v. i. : A deceptive gesture of the pitcher, as if to deliver the ball.

Balk v. t. : To leave or make balks in.

Balk v. t. : To leave heaped up; to heap up in piles.

Balk v. t. : To omit, miss, or overlook by chance.

Balk v. t. : To miss intentionally; to avoid; to shun; to refuse; to let go by; to shirk.

Balk v. t. : To disappoint; to frustrate; to foil; to baffle; to /hwart; as, to balk expectation.

Balk v. i. : To engage in contradiction; to be in opposition.

Balk v. i. : To stop abruptly and stand still obstinately; to jib; to stop short; to swerve; as, the horse balks.

Balk v. i. : To indicate to fishermen, by shouts or signals from shore, the direction taken by the shoals of herring.

Example:
What is the Balk of a cinnamon tree?

Taxonomy
balk, rubber, pitcher, pitch, runners, ball, balk rule, motion, feint, balk rules, free encyclopedia, base runner, dead ball, Major League, hands together, first base, mimics, acts.

Defination from the web:
balk ordinarily results in an immediate dead ball and nullification of any pitch, and each runner is awarded one base. ... While the purpose of the balk rule is to prevent the pitcher from deliberately befuddling the base runner (per comment to Rule 8.05, OBR), or ...