Webster's Revised Unabridged Dictionary · 1913

Yaw

Yaw (ya) , intransitive verb

[Compare Yew, v. i.]

To rise in blisters, breaking in white froth, as cane juice in the clarifiers in sugar works.

Yaw , verb, intransitive and transitive

[Compare Prov. German gagen to rock, gageln to totter, shake, Norw. gaga to bend backward, Icelandic gagr bent back, gaga to throw the neck back.]

(Nautical) To steer wild, or out of the line of her course; to deviate from her course, as when struck by a heavy sea; -- said of a ship.
Just as he would lay the ship's course, all yawing being out of the question. — Lowell

Yaw , noun

(Nautical) A movement of a vessel by which she temporarily alters her course; a deviation from a straight course in steering.