(n) The angular length, sized westward across the celestial equator, between the celestial meridian associated with the observer plus the hour-circle passing through a celestial body.
(n) the angle between the hour circle passing through a given body, and the meridian of a place.
(n) the angular distance along the celestial equator from the observer's meridian into the hour circle of a given celestial human body
Hour Angle in Astronomy Dictionary
the telescope based coordinate specifying the angle, inside equatorial jet, from the meridian to a plane containing the celestial item as well as the north and south celestial poles. by Ka DeansReport definition