Webster's English Dictionary

Enter the word to look up:

yaw

1. yaw \'yo.\ n [origin unknown] : the action of yawing; also : the extent 
   of the movement in yawin g
2. yaw vi of a ship  1a: to deviate erratically from a course (as when 
   struck by a heavy sea)  of an airplane or projectile  1b: to turn by 
   angular motion about the vertical axis  2: to become deflected : SWERVE